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Finding the Fourth Proportional to 279,621.60, 418,557.60 and 220,135.20

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Solution

The fourth proportional to 279,621.60, 418,557.60 and 220,135.20 is: 329,514.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,621.60 : 418,557.60 = 220,135.20 : x
  2. Step 2: Convert to fraction form
    279,621.60/418,557.60 = 220,135.20/x
  3. Step 3: Cross multiply
    279,621.60x = 418,557.60 × 220,135.20
  4. Step 4: Simplify right side
    279,621.60x = 92,139,260,987.52
  5. Step 5: Solve for x
    x = 92,139,260,987.52/279,621.60
  6. Step 6: Final answer
    x = 329,514.10

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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.