Home / 2,520.23-3,781.47-1,286.99

Finding the Fourth Proportional to 2,520.23, 3,781.47 and 1,286.99

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Solution

The fourth proportional to 2,520.23, 3,781.47 and 1,286.99 is: 1,931.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,520.23 : 3,781.47 = 1,286.99 : x
  2. Step 2: Convert to fraction form
    2,520.23/3,781.47 = 1,286.99/x
  3. Step 3: Cross multiply
    2,520.23x = 3,781.47 × 1,286.99
  4. Step 4: Simplify right side
    2,520.23x = 4,866,714.08
  5. Step 5: Solve for x
    x = 4,866,714.08/2,520.23
  6. Step 6: Final answer
    x = 1,931.06

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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.