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Finding the Fourth Proportional to 279,065.60, 418,579.20 and 89,523.20

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Solution

The fourth proportional to 279,065.60, 418,579.20 and 89,523.20 is: 134,278.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,065.60 : 418,579.20 = 89,523.20 : x
  2. Step 2: Convert to fraction form
    279,065.60/418,579.20 = 89,523.20/x
  3. Step 3: Cross multiply
    279,065.60x = 418,579.20 × 89,523.20
  4. Step 4: Simplify right side
    279,065.60x = 37,472,549,437.44
  5. Step 5: Solve for x
    x = 37,472,549,437.44/279,065.60
  6. Step 6: Final answer
    x = 134,278.64

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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.