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Finding the Fourth Proportional to 1,107.71, 1,528.42 and 635.52

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Solution

The fourth proportional to 1,107.71, 1,528.42 and 635.52 is: 876.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,107.71 : 1,528.42 = 635.52 : x
  2. Step 2: Convert to fraction form
    1,107.71/1,528.42 = 635.52/x
  3. Step 3: Cross multiply
    1,107.71x = 1,528.42 × 635.52
  4. Step 4: Simplify right side
    1,107.71x = 971,341.48
  5. Step 5: Solve for x
    x = 971,341.48/1,107.71
  6. Step 6: Final answer
    x = 876.89

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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.