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Finding the Fourth Proportional to 402,279.40, 603,759.30 and 165,791.80

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Solution

The fourth proportional to 402,279.40, 603,759.30 and 165,791.80 is: 248,827.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,279.40 : 603,759.30 = 165,791.80 : x
  2. Step 2: Convert to fraction form
    402,279.40/603,759.30 = 165,791.80/x
  3. Step 3: Cross multiply
    402,279.40x = 603,759.30 × 165,791.80
  4. Step 4: Simplify right side
    402,279.40x = 100,098,341,113.74
  5. Step 5: Solve for x
    x = 100,098,341,113.74/402,279.40
  6. Step 6: Final answer
    x = 248,827.91

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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.