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Finding the Fourth Proportional to 887.49, 1,331.69 and 672.39

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Solution

The fourth proportional to 887.49, 1,331.69 and 672.39 is: 1,008.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    887.49 : 1,331.69 = 672.39 : x
  2. Step 2: Convert to fraction form
    887.49/1,331.69 = 672.39/x
  3. Step 3: Cross multiply
    887.49x = 1,331.69 × 672.39
  4. Step 4: Simplify right side
    887.49x = 895,415.04
  5. Step 5: Solve for x
    x = 895,415.04/887.49
  6. Step 6: Final answer
    x = 1,008.93

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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.