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Finding the Fourth Proportional to 398,619.60, 550,074.19 and 226,514.55

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Solution

The fourth proportional to 398,619.60, 550,074.19 and 226,514.55 is: 312,578.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,619.60 : 550,074.19 = 226,514.55 : x
  2. Step 2: Convert to fraction form
    398,619.60/550,074.19 = 226,514.55/x
  3. Step 3: Cross multiply
    398,619.60x = 550,074.19 × 226,514.55
  4. Step 4: Simplify right side
    398,619.60x = 124,599,807,614.46
  5. Step 5: Solve for x
    x = 124,599,807,614.46/398,619.60
  6. Step 6: Final answer
    x = 312,578.23

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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.