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Finding the Fourth Proportional to 308,880.11, 426,251.28 and 172,915.17

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Solution

The fourth proportional to 308,880.11, 426,251.28 and 172,915.17 is: 238,621.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,880.11 : 426,251.28 = 172,915.17 : x
  2. Step 2: Convert to fraction form
    308,880.11/426,251.28 = 172,915.17/x
  3. Step 3: Cross multiply
    308,880.11x = 426,251.28 × 172,915.17
  4. Step 4: Simplify right side
    308,880.11x = 73,705,312,543.92
  5. Step 5: Solve for x
    x = 73,705,312,543.92/308,880.11
  6. Step 6: Final answer
    x = 238,621.11

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.