Home / 3,934.20-5,428.62-2,605.80

Finding the Fourth Proportional to 3,934.20, 5,428.62 and 2,605.80

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Solution

The fourth proportional to 3,934.20, 5,428.62 and 2,605.80 is: 3,595.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,934.20 : 5,428.62 = 2,605.80 : x
  2. Step 2: Convert to fraction form
    3,934.20/5,428.62 = 2,605.80/x
  3. Step 3: Cross multiply
    3,934.20x = 5,428.62 × 2,605.80
  4. Step 4: Simplify right side
    3,934.20x = 14,145,898.00
  5. Step 5: Solve for x
    x = 14,145,898.00/3,934.20
  6. Step 6: Final answer
    x = 3,595.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.