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Finding the Fourth Proportional to 729.73, 1,090.07 and 656.49

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Solution

The fourth proportional to 729.73, 1,090.07 and 656.49 is: 980.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    729.73 : 1,090.07 = 656.49 : x
  2. Step 2: Convert to fraction form
    729.73/1,090.07 = 656.49/x
  3. Step 3: Cross multiply
    729.73x = 1,090.07 × 656.49
  4. Step 4: Simplify right side
    729.73x = 715,614.60
  5. Step 5: Solve for x
    x = 715,614.60/729.73
  6. Step 6: Final answer
    x = 980.66

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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.