Home / 1,680.74-2,320.35-1,286.54

Finding the Fourth Proportional to 1,680.74, 2,320.35 and 1,286.54

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Solution

The fourth proportional to 1,680.74, 2,320.35 and 1,286.54 is: 1,776.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,680.74 : 2,320.35 = 1,286.54 : x
  2. Step 2: Convert to fraction form
    1,680.74/2,320.35 = 1,286.54/x
  3. Step 3: Cross multiply
    1,680.74x = 2,320.35 × 1,286.54
  4. Step 4: Simplify right side
    1,680.74x = 2,985,223.09
  5. Step 5: Solve for x
    x = 2,985,223.09/1,680.74
  6. Step 6: Final answer
    x = 1,776.14

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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.