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Finding the Fourth Proportional to 312,467.89, 431,206.25 and 169,227.94

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Solution

The fourth proportional to 312,467.89, 431,206.25 and 169,227.94 is: 233,534.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,467.89 : 431,206.25 = 169,227.94 : x
  2. Step 2: Convert to fraction form
    312,467.89/431,206.25 = 169,227.94/x
  3. Step 3: Cross multiply
    312,467.89x = 431,206.25 × 169,227.94
  4. Step 4: Simplify right side
    312,467.89x = 72,972,145,402.63
  5. Step 5: Solve for x
    x = 72,972,145,402.63/312,467.89
  6. Step 6: Final answer
    x = 233,534.86

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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.