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Finding the Fourth Proportional to 880.63, 1,215.28 and 531.25

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Solution

The fourth proportional to 880.63, 1,215.28 and 531.25 is: 733.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    880.63 : 1,215.28 = 531.25 : x
  2. Step 2: Convert to fraction form
    880.63/1,215.28 = 531.25/x
  3. Step 3: Cross multiply
    880.63x = 1,215.28 × 531.25
  4. Step 4: Simplify right side
    880.63x = 645,616.17
  5. Step 5: Solve for x
    x = 645,616.17/880.63
  6. Step 6: Final answer
    x = 733.13

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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.