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Finding the Fourth Proportional to 887.15, 1,329.57 and 424.69

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Solution

The fourth proportional to 887.15, 1,329.57 and 424.69 is: 636.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    887.15 : 1,329.57 = 424.69 : x
  2. Step 2: Convert to fraction form
    887.15/1,329.57 = 424.69/x
  3. Step 3: Cross multiply
    887.15x = 1,329.57 × 424.69
  4. Step 4: Simplify right side
    887.15x = 564,648.44
  5. Step 5: Solve for x
    x = 564,648.44/887.15
  6. Step 6: Final answer
    x = 636.48

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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.