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Finding the Fourth Proportional to 308,952.84, 426,255.84 and 172,966.80

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Solution

The fourth proportional to 308,952.84, 426,255.84 and 172,966.80 is: 238,638.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,952.84 : 426,255.84 = 172,966.80 : x
  2. Step 2: Convert to fraction form
    308,952.84/426,255.84 = 172,966.80/x
  3. Step 3: Cross multiply
    308,952.84x = 426,255.84 × 172,966.80
  4. Step 4: Simplify right side
    308,952.84x = 73,728,108,626.11
  5. Step 5: Solve for x
    x = 73,728,108,626.11/308,952.84
  6. Step 6: Final answer
    x = 238,638.71

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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.