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Finding the Fourth Proportional to 256,640.95, 384,957.17 and 76,726.79

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Solution

The fourth proportional to 256,640.95, 384,957.17 and 76,726.79 is: 115,088.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,640.95 : 384,957.17 = 76,726.79 : x
  2. Step 2: Convert to fraction form
    256,640.95/384,957.17 = 76,726.79/x
  3. Step 3: Cross multiply
    256,640.95x = 384,957.17 × 76,726.79
  4. Step 4: Simplify right side
    256,640.95x = 29,536,526,208.62
  5. Step 5: Solve for x
    x = 29,536,526,208.62/256,640.95
  6. Step 6: Final answer
    x = 115,088.91

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1.5x scale

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.