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Finding the Fourth Proportional to 887.67, 1,331.72 and 628.17

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Solution

The fourth proportional to 887.67, 1,331.72 and 628.17 is: 942.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    887.67 : 1,331.72 = 628.17 : x
  2. Step 2: Convert to fraction form
    887.67/1,331.72 = 628.17/x
  3. Step 3: Cross multiply
    887.67x = 1,331.72 × 628.17
  4. Step 4: Simplify right side
    887.67x = 836,543.41
  5. Step 5: Solve for x
    x = 836,543.41/887.67
  6. Step 6: Final answer
    x = 942.40

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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.