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Finding the Fourth Proportional to 887.65, 1,225.29 and 667.24

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Solution

The fourth proportional to 887.65, 1,225.29 and 667.24 is: 921.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    887.65 : 1,225.29 = 667.24 : x
  2. Step 2: Convert to fraction form
    887.65/1,225.29 = 667.24/x
  3. Step 3: Cross multiply
    887.65x = 1,225.29 × 667.24
  4. Step 4: Simplify right side
    887.65x = 817,559.12
  5. Step 5: Solve for x
    x = 817,559.12/887.65
  6. Step 6: Final answer
    x = 921.04

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.