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Finding the Fourth Proportional to 257,881.92, 386,832.96 and 80,404.80

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Solution

The fourth proportional to 257,881.92, 386,832.96 and 80,404.80 is: 120,610.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,881.92 : 386,832.96 = 80,404.80 : x
  2. Step 2: Convert to fraction form
    257,881.92/386,832.96 = 80,404.80/x
  3. Step 3: Cross multiply
    257,881.92x = 386,832.96 × 80,404.80
  4. Step 4: Simplify right side
    257,881.92x = 31,103,226,782.21
  5. Step 5: Solve for x
    x = 31,103,226,782.21/257,881.92
  6. Step 6: Final answer
    x = 120,610.34

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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.