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Finding the Fourth Proportional to 753.34, 1,039.24 and 531.80

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Solution

The fourth proportional to 753.34, 1,039.24 and 531.80 is: 733.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    753.34 : 1,039.24 = 531.80 : x
  2. Step 2: Convert to fraction form
    753.34/1,039.24 = 531.80/x
  3. Step 3: Cross multiply
    753.34x = 1,039.24 × 531.80
  4. Step 4: Simplify right side
    753.34x = 552,669.10
  5. Step 5: Solve for x
    x = 552,669.10/753.34
  6. Step 6: Final answer
    x = 733.63

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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.