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Finding the Fourth Proportional to 731.60, 1,004.50 and 712.57

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Solution

The fourth proportional to 731.60, 1,004.50 and 712.57 is: 978.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    731.60 : 1,004.50 = 712.57 : x
  2. Step 2: Convert to fraction form
    731.60/1,004.50 = 712.57/x
  3. Step 3: Cross multiply
    731.60x = 1,004.50 × 712.57
  4. Step 4: Simplify right side
    731.60x = 715,776.57
  5. Step 5: Solve for x
    x = 715,776.57/731.60
  6. Step 6: Final answer
    x = 978.37

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.