Home / 261,405.20-391,589.40-155,910.80

Finding the Fourth Proportional to 261,405.20, 391,589.40 and 155,910.80

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Solution

The fourth proportional to 261,405.20, 391,589.40 and 155,910.80 is: 233,557.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,405.20 : 391,589.40 = 155,910.80 : x
  2. Step 2: Convert to fraction form
    261,405.20/391,589.40 = 155,910.80/x
  3. Step 3: Cross multiply
    261,405.20x = 391,589.40 × 155,910.80
  4. Step 4: Simplify right side
    261,405.20x = 61,053,016,625.52
  5. Step 5: Solve for x
    x = 61,053,016,625.52/261,405.20
  6. Step 6: Final answer
    x = 233,557.01

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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.