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Finding the Fourth Proportional to 305,339.38, 421,375.10 and 169,368.90

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Solution

The fourth proportional to 305,339.38, 421,375.10 and 169,368.90 is: 233,732.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,339.38 : 421,375.10 = 169,368.90 : x
  2. Step 2: Convert to fraction form
    305,339.38/421,375.10 = 169,368.90/x
  3. Step 3: Cross multiply
    305,339.38x = 421,375.10 × 169,368.90
  4. Step 4: Simplify right side
    305,339.38x = 71,367,834,747.39
  5. Step 5: Solve for x
    x = 71,367,834,747.39/305,339.38
  6. Step 6: Final answer
    x = 233,732.82

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1.5x scale

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.