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Finding the Fourth Proportional to 1,665.71, 2,498.99 and 625.71

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Solution

The fourth proportional to 1,665.71, 2,498.99 and 625.71 is: 938.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,665.71 : 2,498.99 = 625.71 : x
  2. Step 2: Convert to fraction form
    1,665.71/2,498.99 = 625.71/x
  3. Step 3: Cross multiply
    1,665.71x = 2,498.99 × 625.71
  4. Step 4: Simplify right side
    1,665.71x = 1,563,639.90
  5. Step 5: Solve for x
    x = 1,563,639.90/1,665.71
  6. Step 6: Final answer
    x = 938.73

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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.