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Finding the Fourth Proportional to 709.48, 978.98 and 414.71

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Solution

The fourth proportional to 709.48, 978.98 and 414.71 is: 572.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    709.48 : 978.98 = 414.71 : x
  2. Step 2: Convert to fraction form
    709.48/978.98 = 414.71/x
  3. Step 3: Cross multiply
    709.48x = 978.98 × 414.71
  4. Step 4: Simplify right side
    709.48x = 405,992.80
  5. Step 5: Solve for x
    x = 405,992.80/709.48
  6. Step 6: Final answer
    x = 572.24

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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.