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Finding the Fourth Proportional to 259,799.38, 389,700.88 and 72,810.88

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Solution

The fourth proportional to 259,799.38, 389,700.88 and 72,810.88 is: 109,216.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,799.38 : 389,700.88 = 72,810.88 : x
  2. Step 2: Convert to fraction form
    259,799.38/389,700.88 = 72,810.88/x
  3. Step 3: Cross multiply
    259,799.38x = 389,700.88 × 72,810.88
  4. Step 4: Simplify right side
    259,799.38x = 28,374,464,009.57
  5. Step 5: Solve for x
    x = 28,374,464,009.57/259,799.38
  6. Step 6: Final answer
    x = 109,216.83

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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.