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Finding the Fourth Proportional to 918,051.20, 1,377,076.80 and 412,416.80

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Solution

The fourth proportional to 918,051.20, 1,377,076.80 and 412,416.80 is: 618,625.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    918,051.20 : 1,377,076.80 = 412,416.80 : x
  2. Step 2: Convert to fraction form
    918,051.20/1,377,076.80 = 412,416.80/x
  3. Step 3: Cross multiply
    918,051.20x = 1,377,076.80 × 412,416.80
  4. Step 4: Simplify right side
    918,051.20x = 567,929,607,210.24
  5. Step 5: Solve for x
    x = 567,929,607,210.24/918,051.20
  6. Step 6: Final answer
    x = 618,625.20

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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.