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Finding the Fourth Proportional to 887.11, 1,330.07 and 424.87

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Solution

The fourth proportional to 887.11, 1,330.07 and 424.87 is: 637.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    887.11 : 1,330.07 = 424.87 : x
  2. Step 2: Convert to fraction form
    887.11/1,330.07 = 424.87/x
  3. Step 3: Cross multiply
    887.11x = 1,330.07 × 424.87
  4. Step 4: Simplify right side
    887.11x = 565,104.58
  5. Step 5: Solve for x
    x = 565,104.58/887.11
  6. Step 6: Final answer
    x = 637.02

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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.