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Finding the Fourth Proportional to 521,867.70, 782,801.55 and 311,915.70

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Solution

The fourth proportional to 521,867.70, 782,801.55 and 311,915.70 is: 467,873.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,867.70 : 782,801.55 = 311,915.70 : x
  2. Step 2: Convert to fraction form
    521,867.70/782,801.55 = 311,915.70/x
  3. Step 3: Cross multiply
    521,867.70x = 782,801.55 × 311,915.70
  4. Step 4: Simplify right side
    521,867.70x = 244,168,093,429.34
  5. Step 5: Solve for x
    x = 244,168,093,429.34/521,867.70
  6. Step 6: Final answer
    x = 467,873.55

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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.