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Finding the Fourth Proportional to 256,215.59, 384,556.61 and 136,373.15

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Solution

The fourth proportional to 256,215.59, 384,556.61 and 136,373.15 is: 204,683.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,215.59 : 384,556.61 = 136,373.15 : x
  2. Step 2: Convert to fraction form
    256,215.59/384,556.61 = 136,373.15/x
  3. Step 3: Cross multiply
    256,215.59x = 384,556.61 × 136,373.15
  4. Step 4: Simplify right side
    256,215.59x = 52,443,197,561.35
  5. Step 5: Solve for x
    x = 52,443,197,561.35/256,215.59
  6. Step 6: Final answer
    x = 204,683.87

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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.