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Finding the Fourth Proportional to 308,857.05, 426,191.63 and 172,882.17

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Solution

The fourth proportional to 308,857.05, 426,191.63 and 172,882.17 is: 238,559.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,857.05 : 426,191.63 = 172,882.17 : x
  2. Step 2: Convert to fraction form
    308,857.05/426,191.63 = 172,882.17/x
  3. Step 3: Cross multiply
    308,857.05x = 426,191.63 × 172,882.17
  4. Step 4: Simplify right side
    308,857.05x = 73,680,932,965.83
  5. Step 5: Solve for x
    x = 73,680,932,965.83/308,857.05
  6. Step 6: Final answer
    x = 238,559.98

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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.