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Finding the Fourth Proportional to 621,062.59, 930,929.47 and 321,241.31

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Solution

The fourth proportional to 621,062.59, 930,929.47 and 321,241.31 is: 481,518.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,062.59 : 930,929.47 = 321,241.31 : x
  2. Step 2: Convert to fraction form
    621,062.59/930,929.47 = 321,241.31/x
  3. Step 3: Cross multiply
    621,062.59x = 930,929.47 × 321,241.31
  4. Step 4: Simplify right side
    621,062.59x = 299,053,002,460.41
  5. Step 5: Solve for x
    x = 299,053,002,460.41/621,062.59
  6. Step 6: Final answer
    x = 481,518.30

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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.