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Finding the Fourth Proportional to 407,891.60, 611,837.40 and 218,934.80

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Solution

The fourth proportional to 407,891.60, 611,837.40 and 218,934.80 is: 328,402.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    407,891.60 : 611,837.40 = 218,934.80 : x
  2. Step 2: Convert to fraction form
    407,891.60/611,837.40 = 218,934.80/x
  3. Step 3: Cross multiply
    407,891.60x = 611,837.40 × 218,934.80
  4. Step 4: Simplify right side
    407,891.60x = 133,952,498,801.52
  5. Step 5: Solve for x
    x = 133,952,498,801.52/407,891.60
  6. Step 6: Final answer
    x = 328,402.20

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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.