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Finding the Fourth Proportional to 256,250.75, 384,247.08 and 85,411.96

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Solution

The fourth proportional to 256,250.75, 384,247.08 and 85,411.96 is: 128,074.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,250.75 : 384,247.08 = 85,411.96 : x
  2. Step 2: Convert to fraction form
    256,250.75/384,247.08 = 85,411.96/x
  3. Step 3: Cross multiply
    256,250.75x = 384,247.08 × 85,411.96
  4. Step 4: Simplify right side
    256,250.75x = 32,819,295,266.46
  5. Step 5: Solve for x
    x = 32,819,295,266.46/256,250.75
  6. Step 6: Final answer
    x = 128,074.93

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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.