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Finding the Fourth Proportional to 887.24, 1,331.16 and 425.20

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Solution

The fourth proportional to 887.24, 1,331.16 and 425.20 is: 637.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    887.24 : 1,331.16 = 425.20 : x
  2. Step 2: Convert to fraction form
    887.24/1,331.16 = 425.20/x
  3. Step 3: Cross multiply
    887.24x = 1,331.16 × 425.20
  4. Step 4: Simplify right side
    887.24x = 566,009.23
  5. Step 5: Solve for x
    x = 566,009.23/887.24
  6. Step 6: Final answer
    x = 637.94

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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.