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Finding the Fourth Proportional to 945.20, 1,304.36 and 531.20

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Solution

The fourth proportional to 945.20, 1,304.36 and 531.20 is: 733.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    945.20 : 1,304.36 = 531.20 : x
  2. Step 2: Convert to fraction form
    945.20/1,304.36 = 531.20/x
  3. Step 3: Cross multiply
    945.20x = 1,304.36 × 531.20
  4. Step 4: Simplify right side
    945.20x = 692,866.85
  5. Step 5: Solve for x
    x = 692,866.85/945.20
  6. Step 6: Final answer
    x = 733.04

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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.