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Finding the Fourth Proportional to 521,015.70, 781,523.55 and 311,063.70

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Solution

The fourth proportional to 521,015.70, 781,523.55 and 311,063.70 is: 466,595.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,015.70 : 781,523.55 = 311,063.70 : x
  2. Step 2: Convert to fraction form
    521,015.70/781,523.55 = 311,063.70/x
  3. Step 3: Cross multiply
    521,015.70x = 781,523.55 × 311,063.70
  4. Step 4: Simplify right side
    521,015.70x = 243,103,607,100.14
  5. Step 5: Solve for x
    x = 243,103,607,100.14/521,015.70
  6. Step 6: Final answer
    x = 466,595.55

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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.