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Finding the Fourth Proportional to 1,066.66, 1,469.65 and 716.74

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Solution

The fourth proportional to 1,066.66, 1,469.65 and 716.74 is: 987.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,066.66 : 1,469.65 = 716.74 : x
  2. Step 2: Convert to fraction form
    1,066.66/1,469.65 = 716.74/x
  3. Step 3: Cross multiply
    1,066.66x = 1,469.65 × 716.74
  4. Step 4: Simplify right side
    1,066.66x = 1,053,356.94
  5. Step 5: Solve for x
    x = 1,053,356.94/1,066.66
  6. Step 6: Final answer
    x = 987.53

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.