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Finding the Fourth Proportional to 291,243.02, 436,864.35 and 80,880.90

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Solution

The fourth proportional to 291,243.02, 436,864.35 and 80,880.90 is: 121,321.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,243.02 : 436,864.35 = 80,880.90 : x
  2. Step 2: Convert to fraction form
    291,243.02/436,864.35 = 80,880.90/x
  3. Step 3: Cross multiply
    291,243.02x = 436,864.35 × 80,880.90
  4. Step 4: Simplify right side
    291,243.02x = 35,333,981,805.92
  5. Step 5: Solve for x
    x = 35,333,981,805.92/291,243.02
  6. Step 6: Final answer
    x = 121,321.30

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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.