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Finding the Fourth Proportional to 709.11, 1,063.45 and 435.33

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Solution

The fourth proportional to 709.11, 1,063.45 and 435.33 is: 652.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    709.11 : 1,063.45 = 435.33 : x
  2. Step 2: Convert to fraction form
    709.11/1,063.45 = 435.33/x
  3. Step 3: Cross multiply
    709.11x = 1,063.45 × 435.33
  4. Step 4: Simplify right side
    709.11x = 462,951.69
  5. Step 5: Solve for x
    x = 462,951.69/709.11
  6. Step 6: Final answer
    x = 652.86

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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.