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Finding the Fourth Proportional to 709.87, 979.83 and 415.27

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Solution

The fourth proportional to 709.87, 979.83 and 415.27 is: 573.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    709.87 : 979.83 = 415.27 : x
  2. Step 2: Convert to fraction form
    709.87/979.83 = 415.27/x
  3. Step 3: Cross multiply
    709.87x = 979.83 × 415.27
  4. Step 4: Simplify right side
    709.87x = 406,894.00
  5. Step 5: Solve for x
    x = 406,894.00/709.87
  6. Step 6: Final answer
    x = 573.20

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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.