Home / 261,520.80-391,297.05-172,947.30

Finding the Fourth Proportional to 261,520.80, 391,297.05 and 172,947.30

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Solution

The fourth proportional to 261,520.80, 391,297.05 and 172,947.30 is: 258,770.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,520.80 : 391,297.05 = 172,947.30 : x
  2. Step 2: Convert to fraction form
    261,520.80/391,297.05 = 172,947.30/x
  3. Step 3: Cross multiply
    261,520.80x = 391,297.05 × 172,947.30
  4. Step 4: Simplify right side
    261,520.80x = 67,673,768,295.47
  5. Step 5: Solve for x
    x = 67,673,768,295.47/261,520.80
  6. Step 6: Final answer
    x = 258,770.12

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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.