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Finding the Fourth Proportional to 286,781.60, 395,761.20 and 159,453.92

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Solution

The fourth proportional to 286,781.60, 395,761.20 and 159,453.92 is: 220,047.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,781.60 : 395,761.20 = 159,453.92 : x
  2. Step 2: Convert to fraction form
    286,781.60/395,761.20 = 159,453.92/x
  3. Step 3: Cross multiply
    286,781.60x = 395,761.20 × 159,453.92
  4. Step 4: Simplify right side
    286,781.60x = 63,105,674,723.90
  5. Step 5: Solve for x
    x = 63,105,674,723.90/286,781.60
  6. Step 6: Final answer
    x = 220,047.85

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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.