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Finding the Fourth Proportional to 755.62, 1,131.71 and 636.35

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Solution

The fourth proportional to 755.62, 1,131.71 and 636.35 is: 953.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    755.62 : 1,131.71 = 636.35 : x
  2. Step 2: Convert to fraction form
    755.62/1,131.71 = 636.35/x
  3. Step 3: Cross multiply
    755.62x = 1,131.71 × 636.35
  4. Step 4: Simplify right side
    755.62x = 720,154.82
  5. Step 5: Solve for x
    x = 720,154.82/755.62
  6. Step 6: Final answer
    x = 953.07

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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.