Home / 1,687.74-2,329.26-1,555.40

Finding the Fourth Proportional to 1,687.74, 2,329.26 and 1,555.40

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Solution

The fourth proportional to 1,687.74, 2,329.26 and 1,555.40 is: 2,146.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,687.74 : 2,329.26 = 1,555.40 : x
  2. Step 2: Convert to fraction form
    1,687.74/2,329.26 = 1,555.40/x
  3. Step 3: Cross multiply
    1,687.74x = 2,329.26 × 1,555.40
  4. Step 4: Simplify right side
    1,687.74x = 3,622,931.00
  5. Step 5: Solve for x
    x = 3,622,931.00/1,687.74
  6. Step 6: Final answer
    x = 2,146.62

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.