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Finding the Fourth Proportional to 627,990.79, 866,607.02 and 356,082.90

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Solution

The fourth proportional to 627,990.79, 866,607.02 and 356,082.90 is: 491,382.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,990.79 : 866,607.02 = 356,082.90 : x
  2. Step 2: Convert to fraction form
    627,990.79/866,607.02 = 356,082.90/x
  3. Step 3: Cross multiply
    627,990.79x = 866,607.02 × 356,082.90
  4. Step 4: Simplify right side
    627,990.79x = 308,583,942,021.74
  5. Step 5: Solve for x
    x = 308,583,942,021.74/627,990.79
  6. Step 6: Final answer
    x = 491,382.91

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.