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Finding the Fourth Proportional to 308,722.56, 426,022.65 and 172,773.78

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Solution

The fourth proportional to 308,722.56, 426,022.65 and 172,773.78 is: 238,419.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,722.56 : 426,022.65 = 172,773.78 : x
  2. Step 2: Convert to fraction form
    308,722.56/426,022.65 = 172,773.78/x
  3. Step 3: Cross multiply
    308,722.56x = 426,022.65 × 172,773.78
  4. Step 4: Simplify right side
    308,722.56x = 73,605,543,606.12
  5. Step 5: Solve for x
    x = 73,605,543,606.12/308,722.56
  6. Step 6: Final answer
    x = 238,419.71

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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.