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Finding the Fourth Proportional to 648,000.80, 972,001.20 and 618,476.30

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Solution

The fourth proportional to 648,000.80, 972,001.20 and 618,476.30 is: 927,714.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,000.80 : 972,001.20 = 618,476.30 : x
  2. Step 2: Convert to fraction form
    648,000.80/972,001.20 = 618,476.30/x
  3. Step 3: Cross multiply
    648,000.80x = 972,001.20 × 618,476.30
  4. Step 4: Simplify right side
    648,000.80x = 601,159,705,771.56
  5. Step 5: Solve for x
    x = 601,159,705,771.56/648,000.80
  6. Step 6: Final answer
    x = 927,714.45

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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.