Home / 261,626.20-391,856.10-202,139.80

Finding the Fourth Proportional to 261,626.20, 391,856.10 and 202,139.80

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Solution

The fourth proportional to 261,626.20, 391,856.10 and 202,139.80 is: 302,759.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,626.20 : 391,856.10 = 202,139.80 : x
  2. Step 2: Convert to fraction form
    261,626.20/391,856.10 = 202,139.80/x
  3. Step 3: Cross multiply
    261,626.20x = 391,856.10 × 202,139.80
  4. Step 4: Simplify right side
    261,626.20x = 79,209,713,682.78
  5. Step 5: Solve for x
    x = 79,209,713,682.78/261,626.20
  6. Step 6: Final answer
    x = 302,759.10

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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.