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Finding the Fourth Proportional to 710.16, 1,066.86 and 681

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Solution

The fourth proportional to 710.16, 1,066.86 and 681 is: 1,023.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    710.16 : 1,066.86 = 681 : x
  2. Step 2: Convert to fraction form
    710.16/1,066.86 = 681/x
  3. Step 3: Cross multiply
    710.16x = 1,066.86 × 681
  4. Step 4: Simplify right side
    710.16x = 726,531.66
  5. Step 5: Solve for x
    x = 726,531.66/710.16
  6. Step 6: Final answer
    x = 1,023.05

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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.