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Finding the Fourth Proportional to 279,252.80, 418,879.20 and 146,081.60

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Solution

The fourth proportional to 279,252.80, 418,879.20 and 146,081.60 is: 219,122.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,252.80 : 418,879.20 = 146,081.60 : x
  2. Step 2: Convert to fraction form
    279,252.80/418,879.20 = 146,081.60/x
  3. Step 3: Cross multiply
    279,252.80x = 418,879.20 × 146,081.60
  4. Step 4: Simplify right side
    279,252.80x = 61,190,543,742.72
  5. Step 5: Solve for x
    x = 61,190,543,742.72/279,252.80
  6. Step 6: Final answer
    x = 219,122.40

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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.