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Finding the Fourth Proportional to 886.88, 1,330.34 and 424.58

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Solution

The fourth proportional to 886.88, 1,330.34 and 424.58 is: 636.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    886.88 : 1,330.34 = 424.58 : x
  2. Step 2: Convert to fraction form
    886.88/1,330.34 = 424.58/x
  3. Step 3: Cross multiply
    886.88x = 1,330.34 × 424.58
  4. Step 4: Simplify right side
    886.88x = 564,826.98
  5. Step 5: Solve for x
    x = 564,826.98/886.88
  6. Step 6: Final answer
    x = 636.87

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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.