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Finding the Fourth Proportional to 258,451.95, 387,519.17 and 100,496.28

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Solution

The fourth proportional to 258,451.95, 387,519.17 and 100,496.28 is: 150,682.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,451.95 : 387,519.17 = 100,496.28 : x
  2. Step 2: Convert to fraction form
    258,451.95/387,519.17 = 100,496.28/x
  3. Step 3: Cross multiply
    258,451.95x = 387,519.17 × 100,496.28
  4. Step 4: Simplify right side
    258,451.95x = 38,944,234,511.21
  5. Step 5: Solve for x
    x = 38,944,234,511.21/258,451.95
  6. Step 6: Final answer
    x = 150,682.69

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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.