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Finding the Fourth Proportional to 281,778.56, 388,861.84 and 159,261.20

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Solution

The fourth proportional to 281,778.56, 388,861.84 and 159,261.20 is: 219,784.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,778.56 : 388,861.84 = 159,261.20 : x
  2. Step 2: Convert to fraction form
    281,778.56/388,861.84 = 159,261.20/x
  3. Step 3: Cross multiply
    281,778.56x = 388,861.84 × 159,261.20
  4. Step 4: Simplify right side
    281,778.56x = 61,930,603,272.61
  5. Step 5: Solve for x
    x = 61,930,603,272.61/281,778.56
  6. Step 6: Final answer
    x = 219,784.65

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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.