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Finding the Fourth Proportional to 1,728.70, 2,593.22 and 688.47

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Solution

The fourth proportional to 1,728.70, 2,593.22 and 688.47 is: 1,032.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,728.70 : 2,593.22 = 688.47 : x
  2. Step 2: Convert to fraction form
    1,728.70/2,593.22 = 688.47/x
  3. Step 3: Cross multiply
    1,728.70x = 2,593.22 × 688.47
  4. Step 4: Simplify right side
    1,728.70x = 1,785,354.17
  5. Step 5: Solve for x
    x = 1,785,354.17/1,728.70
  6. Step 6: Final answer
    x = 1,032.77

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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.