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Finding the Fourth Proportional to 391,645.91, 540,288.96 and 230,398.40

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Solution

The fourth proportional to 391,645.91, 540,288.96 and 230,398.40 is: 317,842.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,645.91 : 540,288.96 = 230,398.40 : x
  2. Step 2: Convert to fraction form
    391,645.91/540,288.96 = 230,398.40/x
  3. Step 3: Cross multiply
    391,645.91x = 540,288.96 × 230,398.40
  4. Step 4: Simplify right side
    391,645.91x = 124,481,711,921.66
  5. Step 5: Solve for x
    x = 124,481,711,921.66/391,645.91
  6. Step 6: Final answer
    x = 317,842.49

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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.