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Finding the Fourth Proportional to 755.46, 1,130.76 and 425.52

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Solution

The fourth proportional to 755.46, 1,130.76 and 425.52 is: 636.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    755.46 : 1,130.76 = 425.52 : x
  2. Step 2: Convert to fraction form
    755.46/1,130.76 = 425.52/x
  3. Step 3: Cross multiply
    755.46x = 1,130.76 × 425.52
  4. Step 4: Simplify right side
    755.46x = 481,161.00
  5. Step 5: Solve for x
    x = 481,161.00/755.46
  6. Step 6: Final answer
    x = 636.91

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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.