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Finding the Fourth Proportional to 256,555.15, 384,878.89 and 88,031.91

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Solution

The fourth proportional to 256,555.15, 384,878.89 and 88,031.91 is: 132,063.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,555.15 : 384,878.89 = 88,031.91 : x
  2. Step 2: Convert to fraction form
    256,555.15/384,878.89 = 88,031.91/x
  3. Step 3: Cross multiply
    256,555.15x = 384,878.89 × 88,031.91
  4. Step 4: Simplify right side
    256,555.15x = 33,881,625,358.72
  5. Step 5: Solve for x
    x = 33,881,625,358.72/256,555.15
  6. Step 6: Final answer
    x = 132,063.71

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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.