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Finding the Fourth Proportional to 829.68, 1,144.80 and 534.90

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Solution

The fourth proportional to 829.68, 1,144.80 and 534.90 is: 738.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    829.68 : 1,144.80 = 534.90 : x
  2. Step 2: Convert to fraction form
    829.68/1,144.80 = 534.90/x
  3. Step 3: Cross multiply
    829.68x = 1,144.80 × 534.90
  4. Step 4: Simplify right side
    829.68x = 612,353.52
  5. Step 5: Solve for x
    x = 612,353.52/829.68
  6. Step 6: Final answer
    x = 738.06

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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.