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Finding the Fourth Proportional to 725.58, 1,085.61 and 632.64

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Solution

The fourth proportional to 725.58, 1,085.61 and 632.64 is: 946.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    725.58 : 1,085.61 = 632.64 : x
  2. Step 2: Convert to fraction form
    725.58/1,085.61 = 632.64/x
  3. Step 3: Cross multiply
    725.58x = 1,085.61 × 632.64
  4. Step 4: Simplify right side
    725.58x = 686,800.31
  5. Step 5: Solve for x
    x = 686,800.31/725.58
  6. Step 6: Final answer
    x = 946.55

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.