Home / 1,685.80-2,529.57-1,274.81

Finding the Fourth Proportional to 1,685.80, 2,529.57 and 1,274.81

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Solution

The fourth proportional to 1,685.80, 2,529.57 and 1,274.81 is: 1,912.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,685.80 : 2,529.57 = 1,274.81 : x
  2. Step 2: Convert to fraction form
    1,685.80/2,529.57 = 1,274.81/x
  3. Step 3: Cross multiply
    1,685.80x = 2,529.57 × 1,274.81
  4. Step 4: Simplify right side
    1,685.80x = 3,224,721.13
  5. Step 5: Solve for x
    x = 3,224,721.13/1,685.80
  6. Step 6: Final answer
    x = 1,912.87

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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.