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Finding the Fourth Proportional to 219,613.60, 329,031.60 and 205,616.80

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Solution

The fourth proportional to 219,613.60, 329,031.60 and 205,616.80 is: 308,061.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,613.60 : 329,031.60 = 205,616.80 : x
  2. Step 2: Convert to fraction form
    219,613.60/329,031.60 = 205,616.80/x
  3. Step 3: Cross multiply
    219,613.60x = 329,031.60 × 205,616.80
  4. Step 4: Simplify right side
    219,613.60x = 67,654,424,690.88
  5. Step 5: Solve for x
    x = 67,654,424,690.88/219,613.60
  6. Step 6: Final answer
    x = 308,061.18

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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.