Home / 1,680.85-2,517.18-1,386.52

Finding the Fourth Proportional to 1,680.85, 2,517.18 and 1,386.52

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Solution

The fourth proportional to 1,680.85, 2,517.18 and 1,386.52 is: 2,076.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,680.85 : 2,517.18 = 1,386.52 : x
  2. Step 2: Convert to fraction form
    1,680.85/2,517.18 = 1,386.52/x
  3. Step 3: Cross multiply
    1,680.85x = 2,517.18 × 1,386.52
  4. Step 4: Simplify right side
    1,680.85x = 3,490,108.92
  5. Step 5: Solve for x
    x = 3,490,108.92/1,680.85
  6. Step 6: Final answer
    x = 2,076.39

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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.