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Finding the Fourth Proportional to 309,255.48, 426,519.51 and 217,677.92

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Solution

The fourth proportional to 309,255.48, 426,519.51 and 217,677.92 is: 300,217.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,255.48 : 426,519.51 = 217,677.92 : x
  2. Step 2: Convert to fraction form
    309,255.48/426,519.51 = 217,677.92/x
  3. Step 3: Cross multiply
    309,255.48x = 426,519.51 × 217,677.92
  4. Step 4: Simplify right side
    309,255.48x = 92,843,876,827.33
  5. Step 5: Solve for x
    x = 92,843,876,827.33/309,255.48
  6. Step 6: Final answer
    x = 300,217.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.