Home / 1,687.24-2,518.25-1,438.84

Finding the Fourth Proportional to 1,687.24, 2,518.25 and 1,438.84

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Solution

The fourth proportional to 1,687.24, 2,518.25 and 1,438.84 is: 2,147.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,687.24 : 2,518.25 = 1,438.84 : x
  2. Step 2: Convert to fraction form
    1,687.24/2,518.25 = 1,438.84/x
  3. Step 3: Cross multiply
    1,687.24x = 2,518.25 × 1,438.84
  4. Step 4: Simplify right side
    1,687.24x = 3,623,358.83
  5. Step 5: Solve for x
    x = 3,623,358.83/1,687.24
  6. Step 6: Final answer
    x = 2,147.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.