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Finding the Fourth Proportional to 298,336.80, 447,436.82 and 85,100.66

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Solution

The fourth proportional to 298,336.80, 447,436.82 and 85,100.66 is: 127,631.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    298,336.80 : 447,436.82 = 85,100.66 : x
  2. Step 2: Convert to fraction form
    298,336.80/447,436.82 = 85,100.66/x
  3. Step 3: Cross multiply
    298,336.80x = 447,436.82 × 85,100.66
  4. Step 4: Simplify right side
    298,336.80x = 38,077,168,690.30
  5. Step 5: Solve for x
    x = 38,077,168,690.30/298,336.80
  6. Step 6: Final answer
    x = 127,631.48

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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.