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Finding the Fourth Proportional to 539,136.10, 808,704.15 and 486,648.10

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Solution

The fourth proportional to 539,136.10, 808,704.15 and 486,648.10 is: 729,972.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,136.10 : 808,704.15 = 486,648.10 : x
  2. Step 2: Convert to fraction form
    539,136.10/808,704.15 = 486,648.10/x
  3. Step 3: Cross multiply
    539,136.10x = 808,704.15 × 486,648.10
  4. Step 4: Simplify right side
    539,136.10x = 393,554,338,059.62
  5. Step 5: Solve for x
    x = 393,554,338,059.62/539,136.10
  6. Step 6: Final answer
    x = 729,972.15

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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.