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Finding the Fourth Proportional to 259,486.60, 389,229.90 and 72,497.80

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Solution

The fourth proportional to 259,486.60, 389,229.90 and 72,497.80 is: 108,746.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,486.60 : 389,229.90 = 72,497.80 : x
  2. Step 2: Convert to fraction form
    259,486.60/389,229.90 = 72,497.80/x
  3. Step 3: Cross multiply
    259,486.60x = 389,229.90 × 72,497.80
  4. Step 4: Simplify right side
    259,486.60x = 28,218,311,444.22
  5. Step 5: Solve for x
    x = 28,218,311,444.22/259,486.60
  6. Step 6: Final answer
    x = 108,746.70

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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.