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Finding the Fourth Proportional to 1,135.43, 1,566.85 and 631.27

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Solution

The fourth proportional to 1,135.43, 1,566.85 and 631.27 is: 871.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,135.43 : 1,566.85 = 631.27 : x
  2. Step 2: Convert to fraction form
    1,135.43/1,566.85 = 631.27/x
  3. Step 3: Cross multiply
    1,135.43x = 1,566.85 × 631.27
  4. Step 4: Simplify right side
    1,135.43x = 989,105.40
  5. Step 5: Solve for x
    x = 989,105.40/1,135.43
  6. Step 6: Final answer
    x = 871.13

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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.