Home / 2,520.39-3,782.88-1,288.65

Finding the Fourth Proportional to 2,520.39, 3,782.88 and 1,288.65

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Solution

The fourth proportional to 2,520.39, 3,782.88 and 1,288.65 is: 1,934.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,520.39 : 3,782.88 = 1,288.65 : x
  2. Step 2: Convert to fraction form
    2,520.39/3,782.88 = 1,288.65/x
  3. Step 3: Cross multiply
    2,520.39x = 3,782.88 × 1,288.65
  4. Step 4: Simplify right side
    2,520.39x = 4,874,808.31
  5. Step 5: Solve for x
    x = 4,874,808.31/2,520.39
  6. Step 6: Final answer
    x = 1,934.15

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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.