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Finding the Fourth Proportional to 887.17, 1,328.92 and 691.96

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Solution

The fourth proportional to 887.17, 1,328.92 and 691.96 is: 1,036.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    887.17 : 1,328.92 = 691.96 : x
  2. Step 2: Convert to fraction form
    887.17/1,328.92 = 691.96/x
  3. Step 3: Cross multiply
    887.17x = 1,328.92 × 691.96
  4. Step 4: Simplify right side
    887.17x = 919,559.48
  5. Step 5: Solve for x
    x = 919,559.48/887.17
  6. Step 6: Final answer
    x = 1,036.51

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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.