Home / 1,687.87-2,545.63-1,669.47

Finding the Fourth Proportional to 1,687.87, 2,545.63 and 1,669.47

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Solution

The fourth proportional to 1,687.87, 2,545.63 and 1,669.47 is: 2,517.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,687.87 : 2,545.63 = 1,669.47 : x
  2. Step 2: Convert to fraction form
    1,687.87/2,545.63 = 1,669.47/x
  3. Step 3: Cross multiply
    1,687.87x = 2,545.63 × 1,669.47
  4. Step 4: Simplify right side
    1,687.87x = 4,249,852.92
  5. Step 5: Solve for x
    x = 4,249,852.92/1,687.87
  6. Step 6: Final answer
    x = 2,517.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.