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Finding the Fourth Proportional to 281,645.20, 421,690.20 and 219,437.20

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Solution

The fourth proportional to 281,645.20, 421,690.20 and 219,437.20 is: 328,549.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,645.20 : 421,690.20 = 219,437.20 : x
  2. Step 2: Convert to fraction form
    281,645.20/421,690.20 = 219,437.20/x
  3. Step 3: Cross multiply
    281,645.20x = 421,690.20 × 219,437.20
  4. Step 4: Simplify right side
    281,645.20x = 92,534,516,755.44
  5. Step 5: Solve for x
    x = 92,534,516,755.44/281,645.20
  6. Step 6: Final answer
    x = 328,549.95

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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.