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Finding the Fourth Proportional to 291,221.52, 436,832.10 and 80,859.40

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Solution

The fourth proportional to 291,221.52, 436,832.10 and 80,859.40 is: 121,289.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,221.52 : 436,832.10 = 80,859.40 : x
  2. Step 2: Convert to fraction form
    291,221.52/436,832.10 = 80,859.40/x
  3. Step 3: Cross multiply
    291,221.52x = 436,832.10 × 80,859.40
  4. Step 4: Simplify right side
    291,221.52x = 35,321,981,506.74
  5. Step 5: Solve for x
    x = 35,321,981,506.74/291,221.52
  6. Step 6: Final answer
    x = 121,289.05

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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.