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Finding the Fourth Proportional to 1,129.47, 1,694.17 and 635.86

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Solution

The fourth proportional to 1,129.47, 1,694.17 and 635.86 is: 953.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,129.47 : 1,694.17 = 635.86 : x
  2. Step 2: Convert to fraction form
    1,129.47/1,694.17 = 635.86/x
  3. Step 3: Cross multiply
    1,129.47x = 1,694.17 × 635.86
  4. Step 4: Simplify right side
    1,129.47x = 1,077,254.94
  5. Step 5: Solve for x
    x = 1,077,254.94/1,129.47
  6. Step 6: Final answer
    x = 953.77

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.