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Finding the Fourth Proportional to 791,807.80, 1,187,711.70 and 318,832.60

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Solution

The fourth proportional to 791,807.80, 1,187,711.70 and 318,832.60 is: 478,248.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    791,807.80 : 1,187,711.70 = 318,832.60 : x
  2. Step 2: Convert to fraction form
    791,807.80/1,187,711.70 = 318,832.60/x
  3. Step 3: Cross multiply
    791,807.80x = 1,187,711.70 × 318,832.60
  4. Step 4: Simplify right side
    791,807.80x = 378,681,209,361.42
  5. Step 5: Solve for x
    x = 378,681,209,361.42/791,807.80
  6. Step 6: Final answer
    x = 478,248.90

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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.