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Finding the Fourth Proportional to 709.72, 1,066.12 and 617.47

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Solution

The fourth proportional to 709.72, 1,066.12 and 617.47 is: 927.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    709.72 : 1,066.12 = 617.47 : x
  2. Step 2: Convert to fraction form
    709.72/1,066.12 = 617.47/x
  3. Step 3: Cross multiply
    709.72x = 1,066.12 × 617.47
  4. Step 4: Simplify right side
    709.72x = 658,292.91
  5. Step 5: Solve for x
    x = 658,292.91/709.72
  6. Step 6: Final answer
    x = 927.54

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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.