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Finding the Fourth Proportional to 1,721.79, 2,581.14 and 625.39

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Solution

The fourth proportional to 1,721.79, 2,581.14 and 625.39 is: 937.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,721.79 : 2,581.14 = 625.39 : x
  2. Step 2: Convert to fraction form
    1,721.79/2,581.14 = 625.39/x
  3. Step 3: Cross multiply
    1,721.79x = 2,581.14 × 625.39
  4. Step 4: Simplify right side
    1,721.79x = 1,614,219.14
  5. Step 5: Solve for x
    x = 1,614,219.14/1,721.79
  6. Step 6: Final answer
    x = 937.52

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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.