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Finding the Fourth Proportional to 753.39, 1,040.58 and 533.31

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Solution

The fourth proportional to 753.39, 1,040.58 and 533.31 is: 736.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    753.39 : 1,040.58 = 533.31 : x
  2. Step 2: Convert to fraction form
    753.39/1,040.58 = 533.31/x
  3. Step 3: Cross multiply
    753.39x = 1,040.58 × 533.31
  4. Step 4: Simplify right side
    753.39x = 554,951.72
  5. Step 5: Solve for x
    x = 554,951.72/753.39
  6. Step 6: Final answer
    x = 736.61

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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.