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Finding the Fourth Proportional to 312,353.43, 431,047.89 and 169,113.39

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Solution

The fourth proportional to 312,353.43, 431,047.89 and 169,113.39 is: 233,376.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,353.43 : 431,047.89 = 169,113.39 : x
  2. Step 2: Convert to fraction form
    312,353.43/431,047.89 = 169,113.39/x
  3. Step 3: Cross multiply
    312,353.43x = 431,047.89 × 169,113.39
  4. Step 4: Simplify right side
    312,353.43x = 72,895,969,930.25
  5. Step 5: Solve for x
    x = 72,895,969,930.25/312,353.43
  6. Step 6: Final answer
    x = 233,376.56

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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.