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Finding the Fourth Proportional to 256,478.91, 384,718.36 and 69,490.41

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Solution

The fourth proportional to 256,478.91, 384,718.36 and 69,490.41 is: 104,235.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,478.91 : 384,718.36 = 69,490.41 : x
  2. Step 2: Convert to fraction form
    256,478.91/384,718.36 = 69,490.41/x
  3. Step 3: Cross multiply
    256,478.91x = 384,718.36 × 69,490.41
  4. Step 4: Simplify right side
    256,478.91x = 26,734,235,084.80
  5. Step 5: Solve for x
    x = 26,734,235,084.80/256,478.91
  6. Step 6: Final answer
    x = 104,235.61

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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.