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Finding the Fourth Proportional to 389,960.30, 583,956.30 and 256,115.90

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Solution

The fourth proportional to 389,960.30, 583,956.30 and 256,115.90 is: 383,527.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,960.30 : 583,956.30 = 256,115.90 : x
  2. Step 2: Convert to fraction form
    389,960.30/583,956.30 = 256,115.90/x
  3. Step 3: Cross multiply
    389,960.30x = 583,956.30 × 256,115.90
  4. Step 4: Simplify right side
    389,960.30x = 149,560,493,335.17
  5. Step 5: Solve for x
    x = 149,560,493,335.17/389,960.30
  6. Step 6: Final answer
    x = 383,527.49

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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.