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Finding the Fourth Proportional to 1,066.59, 1,471.14 and 817.38

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Solution

The fourth proportional to 1,066.59, 1,471.14 and 817.38 is: 1,127.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,066.59 : 1,471.14 = 817.38 : x
  2. Step 2: Convert to fraction form
    1,066.59/1,471.14 = 817.38/x
  3. Step 3: Cross multiply
    1,066.59x = 1,471.14 × 817.38
  4. Step 4: Simplify right side
    1,066.59x = 1,202,480.41
  5. Step 5: Solve for x
    x = 1,202,480.41/1,066.59
  6. Step 6: Final answer
    x = 1,127.41

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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.