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Finding the Fourth Proportional to 709.57, 979.20 and 414.89

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Solution

The fourth proportional to 709.57, 979.20 and 414.89 is: 572.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    709.57 : 979.20 = 414.89 : x
  2. Step 2: Convert to fraction form
    709.57/979.20 = 414.89/x
  3. Step 3: Cross multiply
    709.57x = 979.20 × 414.89
  4. Step 4: Simplify right side
    709.57x = 406,260.29
  5. Step 5: Solve for x
    x = 406,260.29/709.57
  6. Step 6: Final answer
    x = 572.55

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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.