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Finding the Fourth Proportional to 710.74, 1,066.02 and 679.15

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Solution

The fourth proportional to 710.74, 1,066.02 and 679.15 is: 1,018.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    710.74 : 1,066.02 = 679.15 : x
  2. Step 2: Convert to fraction form
    710.74/1,066.02 = 679.15/x
  3. Step 3: Cross multiply
    710.74x = 1,066.02 × 679.15
  4. Step 4: Simplify right side
    710.74x = 723,987.48
  5. Step 5: Solve for x
    x = 723,987.48/710.74
  6. Step 6: Final answer
    x = 1,018.64

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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.