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Finding the Fourth Proportional to 256,264.18, 384,242.91 and 87,728.38

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Solution

The fourth proportional to 256,264.18, 384,242.91 and 87,728.38 is: 131,540.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,264.18 : 384,242.91 = 87,728.38 : x
  2. Step 2: Convert to fraction form
    256,264.18/384,242.91 = 87,728.38/x
  3. Step 3: Cross multiply
    256,264.18x = 384,242.91 × 87,728.38
  4. Step 4: Simplify right side
    256,264.18x = 33,709,008,020.79
  5. Step 5: Solve for x
    x = 33,709,008,020.79/256,264.18
  6. Step 6: Final answer
    x = 131,540.07

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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.