Home / 256,640.19-384,956.05-76,726.04

Finding the Fourth Proportional to 256,640.19, 384,956.05 and 76,726.04

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Solution

The fourth proportional to 256,640.19, 384,956.05 and 76,726.04 is: 115,087.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,640.19 : 384,956.05 = 76,726.04 : x
  2. Step 2: Convert to fraction form
    256,640.19/384,956.05 = 76,726.04/x
  3. Step 3: Cross multiply
    256,640.19x = 384,956.05 × 76,726.04
  4. Step 4: Simplify right side
    256,640.19x = 29,536,151,173.95
  5. Step 5: Solve for x
    x = 29,536,151,173.95/256,640.19
  6. Step 6: Final answer
    x = 115,087.78

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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.