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Finding the Fourth Proportional to 291,250.80, 436,001.40 and 172,861.20

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Solution

The fourth proportional to 291,250.80, 436,001.40 and 172,861.20 is: 258,772.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,250.80 : 436,001.40 = 172,861.20 : x
  2. Step 2: Convert to fraction form
    291,250.80/436,001.40 = 172,861.20/x
  3. Step 3: Cross multiply
    291,250.80x = 436,001.40 × 172,861.20
  4. Step 4: Simplify right side
    291,250.80x = 75,367,725,205.68
  5. Step 5: Solve for x
    x = 75,367,725,205.68/291,250.80
  6. Step 6: Final answer
    x = 258,772.59

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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.