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Finding the Fourth Proportional to 39,279.80, 58,833.30 and 38,415.80

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Solution

The fourth proportional to 39,279.80, 58,833.30 and 38,415.80 is: 57,539.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,279.80 : 58,833.30 = 38,415.80 : x
  2. Step 2: Convert to fraction form
    39,279.80/58,833.30 = 38,415.80/x
  3. Step 3: Cross multiply
    39,279.80x = 58,833.30 × 38,415.80
  4. Step 4: Simplify right side
    39,279.80x = 2,260,128,286.14
  5. Step 5: Solve for x
    x = 2,260,128,286.14/39,279.80
  6. Step 6: Final answer
    x = 57,539.20

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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.