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Finding the Fourth Proportional to 308,881.85, 426,256.83 and 172,947.66

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Solution

The fourth proportional to 308,881.85, 426,256.83 and 172,947.66 is: 238,667.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,881.85 : 426,256.83 = 172,947.66 : x
  2. Step 2: Convert to fraction form
    308,881.85/426,256.83 = 172,947.66/x
  3. Step 3: Cross multiply
    308,881.85x = 426,256.83 × 172,947.66
  4. Step 4: Simplify right side
    308,881.85x = 73,720,119,709.05
  5. Step 5: Solve for x
    x = 73,720,119,709.05/308,881.85
  6. Step 6: Final answer
    x = 238,667.70

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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.