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Finding the Fourth Proportional to 579,387.60, 869,081.40 and 402,440.40

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Solution

The fourth proportional to 579,387.60, 869,081.40 and 402,440.40 is: 603,660.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,387.60 : 869,081.40 = 402,440.40 : x
  2. Step 2: Convert to fraction form
    579,387.60/869,081.40 = 402,440.40/x
  3. Step 3: Cross multiply
    579,387.60x = 869,081.40 × 402,440.40
  4. Step 4: Simplify right side
    579,387.60x = 349,753,466,248.56
  5. Step 5: Solve for x
    x = 349,753,466,248.56/579,387.60
  6. Step 6: Final answer
    x = 603,660.60

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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.