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Finding the Fourth Proportional to 918,178,000.80, 1,377,267,001.20 and 918,178,000.80

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Solution

The fourth proportional to 918,178,000.80, 1,377,267,001.20 and 918,178,000.80 is: 1,377,267,001.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    918,178,000.80 : 1,377,267,001.20 = 918,178,000.80 : x
  2. Step 2: Convert to fraction form
    918,178,000.80/1,377,267,001.20 = 918,178,000.80/x
  3. Step 3: Cross multiply
    918,178,000.80x = 1,377,267,001.20 × 918,178,000.80
  4. Step 4: Simplify right side
    918,178,000.80x = 1,264,576,261,729,627,136
  5. Step 5: Solve for x
    x = 1,264,576,261,729,627,136/918,178,000.80
  6. Step 6: Final answer
    x = 1,377,267,001.20

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.