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Finding the Fourth Proportional to 709.60, 1,063.67 and 384.28

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Solution

The fourth proportional to 709.60, 1,063.67 and 384.28 is: 576.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    709.60 : 1,063.67 = 384.28 : x
  2. Step 2: Convert to fraction form
    709.60/1,063.67 = 384.28/x
  3. Step 3: Cross multiply
    709.60x = 1,063.67 × 384.28
  4. Step 4: Simplify right side
    709.60x = 408,747.11
  5. Step 5: Solve for x
    x = 408,747.11/709.60
  6. Step 6: Final answer
    x = 576.02

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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.