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Finding the Fourth Proportional to 579,337.60, 869,006.40 and 402,390.40

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Solution

The fourth proportional to 579,337.60, 869,006.40 and 402,390.40 is: 603,585.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,337.60 : 869,006.40 = 402,390.40 : x
  2. Step 2: Convert to fraction form
    579,337.60/869,006.40 = 402,390.40/x
  3. Step 3: Cross multiply
    579,337.60x = 869,006.40 × 402,390.40
  4. Step 4: Simplify right side
    579,337.60x = 349,679,832,898.56
  5. Step 5: Solve for x
    x = 349,679,832,898.56/579,337.60
  6. Step 6: Final answer
    x = 603,585.60

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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.