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Finding the Fourth Proportional to 219,015.30, 328,521 and 69,255.70

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Solution

The fourth proportional to 219,015.30, 328,521 and 69,255.70 is: 103,882.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,015.30 : 328,521 = 69,255.70 : x
  2. Step 2: Convert to fraction form
    219,015.30/328,521 = 69,255.70/x
  3. Step 3: Cross multiply
    219,015.30x = 328,521 × 69,255.70
  4. Step 4: Simplify right side
    219,015.30x = 22,751,951,819.70
  5. Step 5: Solve for x
    x = 22,751,951,819.70/219,015.30
  6. Step 6: Final answer
    x = 103,882.93

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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.