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Finding the Fourth Proportional to 310,331.34, 428,257.54 and 176,195.34

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Solution

The fourth proportional to 310,331.34, 428,257.54 and 176,195.34 is: 243,149.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,331.34 : 428,257.54 = 176,195.34 : x
  2. Step 2: Convert to fraction form
    310,331.34/428,257.54 = 176,195.34/x
  3. Step 3: Cross multiply
    310,331.34x = 428,257.54 × 176,195.34
  4. Step 4: Simplify right side
    310,331.34x = 75,456,982,867.86
  5. Step 5: Solve for x
    x = 75,456,982,867.86/310,331.34
  6. Step 6: Final answer
    x = 243,149.73

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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.