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Finding the Fourth Proportional to 521,036.70, 781,555.05 and 311,084.70

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Solution

The fourth proportional to 521,036.70, 781,555.05 and 311,084.70 is: 466,627.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,036.70 : 781,555.05 = 311,084.70 : x
  2. Step 2: Convert to fraction form
    521,036.70/781,555.05 = 311,084.70/x
  3. Step 3: Cross multiply
    521,036.70x = 781,555.05 × 311,084.70
  4. Step 4: Simplify right side
    521,036.70x = 243,129,818,262.74
  5. Step 5: Solve for x
    x = 243,129,818,262.74/521,036.70
  6. Step 6: Final answer
    x = 466,627.05

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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.