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Finding the Fourth Proportional to 1,149.97, 1,587.51 and 708.25

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Solution

The fourth proportional to 1,149.97, 1,587.51 and 708.25 is: 977.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,149.97 : 1,587.51 = 708.25 : x
  2. Step 2: Convert to fraction form
    1,149.97/1,587.51 = 708.25/x
  3. Step 3: Cross multiply
    1,149.97x = 1,587.51 × 708.25
  4. Step 4: Simplify right side
    1,149.97x = 1,124,342.48
  5. Step 5: Solve for x
    x = 1,124,342.48/1,149.97
  6. Step 6: Final answer
    x = 977.72

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.