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Finding the Fourth Proportional to 308,251.17, 425,378.25 and 172,286.19

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Solution

The fourth proportional to 308,251.17, 425,378.25 and 172,286.19 is: 237,750.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,251.17 : 425,378.25 = 172,286.19 : x
  2. Step 2: Convert to fraction form
    308,251.17/425,378.25 = 172,286.19/x
  3. Step 3: Cross multiply
    308,251.17x = 425,378.25 × 172,286.19
  4. Step 4: Simplify right side
    308,251.17x = 73,286,798,001.37
  5. Step 5: Solve for x
    x = 73,286,798,001.37/308,251.17
  6. Step 6: Final answer
    x = 237,750.27

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1.5x scale

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.