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Finding the Fourth Proportional to 1,008.70, 1,391.94 and 566.56

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Solution

The fourth proportional to 1,008.70, 1,391.94 and 566.56 is: 781.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,008.70 : 1,391.94 = 566.56 : x
  2. Step 2: Convert to fraction form
    1,008.70/1,391.94 = 566.56/x
  3. Step 3: Cross multiply
    1,008.70x = 1,391.94 × 566.56
  4. Step 4: Simplify right side
    1,008.70x = 788,617.53
  5. Step 5: Solve for x
    x = 788,617.53/1,008.70
  6. Step 6: Final answer
    x = 781.82

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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.