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Finding the Fourth Proportional to 887.70, 1,330.92 and 424.92

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Solution

The fourth proportional to 887.70, 1,330.92 and 424.92 is: 637.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    887.70 : 1,330.92 = 424.92 : x
  2. Step 2: Convert to fraction form
    887.70/1,330.92 = 424.92/x
  3. Step 3: Cross multiply
    887.70x = 1,330.92 × 424.92
  4. Step 4: Simplify right side
    887.70x = 565,534.53
  5. Step 5: Solve for x
    x = 565,534.53/887.70
  6. Step 6: Final answer
    x = 637.08

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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.