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Finding the Fourth Proportional to 279,326.60, 385,663.56 and 261,480.68

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Solution

The fourth proportional to 279,326.60, 385,663.56 and 261,480.68 is: 361,023.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,326.60 : 385,663.56 = 261,480.68 : x
  2. Step 2: Convert to fraction form
    279,326.60/385,663.56 = 261,480.68/x
  3. Step 3: Cross multiply
    279,326.60x = 385,663.56 × 261,480.68
  4. Step 4: Simplify right side
    279,326.60x = 100,843,569,920.02
  5. Step 5: Solve for x
    x = 100,843,569,920.02/279,326.60
  6. Step 6: Final answer
    x = 361,023.87

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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.