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Finding the Fourth Proportional to 256,976.64, 385,490.76 and 88,474.66

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Solution

The fourth proportional to 256,976.64, 385,490.76 and 88,474.66 is: 132,720.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,976.64 : 385,490.76 = 88,474.66 : x
  2. Step 2: Convert to fraction form
    256,976.64/385,490.76 = 88,474.66/x
  3. Step 3: Cross multiply
    256,976.64x = 385,490.76 × 88,474.66
  4. Step 4: Simplify right side
    256,976.64x = 34,106,163,924.14
  5. Step 5: Solve for x
    x = 34,106,163,924.14/256,976.64
  6. Step 6: Final answer
    x = 132,720.87

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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.