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Finding the Fourth Proportional to 256,787.21, 385,223.85 and 88,300.73

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Solution

The fourth proportional to 256,787.21, 385,223.85 and 88,300.73 is: 132,465.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,787.21 : 385,223.85 = 88,300.73 : x
  2. Step 2: Convert to fraction form
    256,787.21/385,223.85 = 88,300.73/x
  3. Step 3: Cross multiply
    256,787.21x = 385,223.85 × 88,300.73
  4. Step 4: Simplify right side
    256,787.21x = 34,015,548,131.47
  5. Step 5: Solve for x
    x = 34,015,548,131.47/256,787.21
  6. Step 6: Final answer
    x = 132,465.90

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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.