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Finding the Fourth Proportional to 308,116.80, 462,175.20 and 217,915.20

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Solution

The fourth proportional to 308,116.80, 462,175.20 and 217,915.20 is: 326,872.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,116.80 : 462,175.20 = 217,915.20 : x
  2. Step 2: Convert to fraction form
    308,116.80/462,175.20 = 217,915.20/x
  3. Step 3: Cross multiply
    308,116.80x = 462,175.20 × 217,915.20
  4. Step 4: Simplify right side
    308,116.80x = 100,715,001,143.04
  5. Step 5: Solve for x
    x = 100,715,001,143.04/308,116.80
  6. Step 6: Final answer
    x = 326,872.80

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1.5x scale

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.