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Finding the Fourth Proportional to 579,140.80, 868,711.20 and 491,660.80

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Solution

The fourth proportional to 579,140.80, 868,711.20 and 491,660.80 is: 737,491.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,140.80 : 868,711.20 = 491,660.80 : x
  2. Step 2: Convert to fraction form
    579,140.80/868,711.20 = 491,660.80/x
  3. Step 3: Cross multiply
    579,140.80x = 868,711.20 × 491,660.80
  4. Step 4: Simplify right side
    579,140.80x = 427,111,243,560.96
  5. Step 5: Solve for x
    x = 427,111,243,560.96/579,140.80
  6. Step 6: Final answer
    x = 737,491.20

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Half scale
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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.