Home / 261,092.20-391,638.30-172,445.80

Finding the Fourth Proportional to 261,092.20, 391,638.30 and 172,445.80

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Solution

The fourth proportional to 261,092.20, 391,638.30 and 172,445.80 is: 258,668.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,092.20 : 391,638.30 = 172,445.80 : x
  2. Step 2: Convert to fraction form
    261,092.20/391,638.30 = 172,445.80/x
  3. Step 3: Cross multiply
    261,092.20x = 391,638.30 × 172,445.80
  4. Step 4: Simplify right side
    261,092.20x = 67,536,379,954.14
  5. Step 5: Solve for x
    x = 67,536,379,954.14/261,092.20
  6. Step 6: Final answer
    x = 258,668.70

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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.