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Finding the Fourth Proportional to 509,550.30, 764,325.45 and 391,815.90

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Solution

The fourth proportional to 509,550.30, 764,325.45 and 391,815.90 is: 587,723.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    509,550.30 : 764,325.45 = 391,815.90 : x
  2. Step 2: Convert to fraction form
    509,550.30/764,325.45 = 391,815.90/x
  3. Step 3: Cross multiply
    509,550.30x = 764,325.45 × 391,815.90
  4. Step 4: Simplify right side
    509,550.30x = 299,474,864,084.66
  5. Step 5: Solve for x
    x = 299,474,864,084.66/509,550.30
  6. Step 6: Final answer
    x = 587,723.85

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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.