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Finding the Fourth Proportional to 260,799.72, 391,273.80 and 83,320.56

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Solution

The fourth proportional to 260,799.72, 391,273.80 and 83,320.56 is: 125,004.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,799.72 : 391,273.80 = 83,320.56 : x
  2. Step 2: Convert to fraction form
    260,799.72/391,273.80 = 83,320.56/x
  3. Step 3: Cross multiply
    260,799.72x = 391,273.80 × 83,320.56
  4. Step 4: Simplify right side
    260,799.72x = 32,601,152,129.33
  5. Step 5: Solve for x
    x = 32,601,152,129.33/260,799.72
  6. Step 6: Final answer
    x = 125,004.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.