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Finding the Fourth Proportional to 731.35, 1,087.62 and 708.28

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Solution

The fourth proportional to 731.35, 1,087.62 and 708.28 is: 1,053.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    731.35 : 1,087.62 = 708.28 : x
  2. Step 2: Convert to fraction form
    731.35/1,087.62 = 708.28/x
  3. Step 3: Cross multiply
    731.35x = 1,087.62 × 708.28
  4. Step 4: Simplify right side
    731.35x = 770,333.23
  5. Step 5: Solve for x
    x = 770,333.23/731.35
  6. Step 6: Final answer
    x = 1,053.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.