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Finding the Fourth Proportional to 1,617.38, 2,426.57 and 521.83

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Solution

The fourth proportional to 1,617.38, 2,426.57 and 521.83 is: 782.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,617.38 : 2,426.57 = 521.83 : x
  2. Step 2: Convert to fraction form
    1,617.38/2,426.57 = 521.83/x
  3. Step 3: Cross multiply
    1,617.38x = 2,426.57 × 521.83
  4. Step 4: Simplify right side
    1,617.38x = 1,266,248.69
  5. Step 5: Solve for x
    x = 1,266,248.69/1,617.38
  6. Step 6: Final answer
    x = 782.90

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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.