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Finding the Fourth Proportional to 912.59, 1,367.82 and 424.61

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Solution

The fourth proportional to 912.59, 1,367.82 and 424.61 is: 636.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    912.59 : 1,367.82 = 424.61 : x
  2. Step 2: Convert to fraction form
    912.59/1,367.82 = 424.61/x
  3. Step 3: Cross multiply
    912.59x = 1,367.82 × 424.61
  4. Step 4: Simplify right side
    912.59x = 580,783.21
  5. Step 5: Solve for x
    x = 580,783.21/912.59
  6. Step 6: Final answer
    x = 636.42

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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.