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Finding the Fourth Proportional to 219,820.80, 329,731.20 and 218,508.60

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Solution

The fourth proportional to 219,820.80, 329,731.20 and 218,508.60 is: 327,762.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,820.80 : 329,731.20 = 218,508.60 : x
  2. Step 2: Convert to fraction form
    219,820.80/329,731.20 = 218,508.60/x
  3. Step 3: Cross multiply
    219,820.80x = 329,731.20 × 218,508.60
  4. Step 4: Simplify right side
    219,820.80x = 72,049,102,888.32
  5. Step 5: Solve for x
    x = 72,049,102,888.32/219,820.80
  6. Step 6: Final answer
    x = 327,762.90

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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.