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Finding the Fourth Proportional to 286,778.67, 395,759.13 and 157,722.78

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Solution

The fourth proportional to 286,778.67, 395,759.13 and 157,722.78 is: 217,659.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,778.67 : 395,759.13 = 157,722.78 : x
  2. Step 2: Convert to fraction form
    286,778.67/395,759.13 = 157,722.78/x
  3. Step 3: Cross multiply
    286,778.67x = 395,759.13 × 157,722.78
  4. Step 4: Simplify right side
    286,778.67x = 62,420,230,193.98
  5. Step 5: Solve for x
    x = 62,420,230,193.98/286,778.67
  6. Step 6: Final answer
    x = 217,659.95

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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.