Home / 1,680.29-2,521.28-755.66

Finding the Fourth Proportional to 1,680.29, 2,521.28 and 755.66

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Solution

The fourth proportional to 1,680.29, 2,521.28 and 755.66 is: 1,133.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,680.29 : 2,521.28 = 755.66 : x
  2. Step 2: Convert to fraction form
    1,680.29/2,521.28 = 755.66/x
  3. Step 3: Cross multiply
    1,680.29x = 2,521.28 × 755.66
  4. Step 4: Simplify right side
    1,680.29x = 1,905,217.84
  5. Step 5: Solve for x
    x = 1,905,217.84/1,680.29
  6. Step 6: Final answer
    x = 1,133.87

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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.