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Finding the Fourth Proportional to 1,347.61, 2,023.31 and 689.96

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Solution

The fourth proportional to 1,347.61, 2,023.31 and 689.96 is: 1,035.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,347.61 : 2,023.31 = 689.96 : x
  2. Step 2: Convert to fraction form
    1,347.61/2,023.31 = 689.96/x
  3. Step 3: Cross multiply
    1,347.61x = 2,023.31 × 689.96
  4. Step 4: Simplify right side
    1,347.61x = 1,396,002.97
  5. Step 5: Solve for x
    x = 1,396,002.97/1,347.61
  6. Step 6: Final answer
    x = 1,035.91

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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.