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Finding the Fourth Proportional to 754.22, 1,130.58 and 424.77

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Solution

The fourth proportional to 754.22, 1,130.58 and 424.77 is: 636.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    754.22 : 1,130.58 = 424.77 : x
  2. Step 2: Convert to fraction form
    754.22/1,130.58 = 424.77/x
  3. Step 3: Cross multiply
    754.22x = 1,130.58 × 424.77
  4. Step 4: Simplify right side
    754.22x = 480,236.47
  5. Step 5: Solve for x
    x = 480,236.47/754.22
  6. Step 6: Final answer
    x = 636.74

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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.