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Finding the Fourth Proportional to 1,343.46, 2,014.17 and 693.78

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Solution

The fourth proportional to 1,343.46, 2,014.17 and 693.78 is: 1,040.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,343.46 : 2,014.17 = 693.78 : x
  2. Step 2: Convert to fraction form
    1,343.46/2,014.17 = 693.78/x
  3. Step 3: Cross multiply
    1,343.46x = 2,014.17 × 693.78
  4. Step 4: Simplify right side
    1,343.46x = 1,397,390.86
  5. Step 5: Solve for x
    x = 1,397,390.86/1,343.46
  6. Step 6: Final answer
    x = 1,040.14

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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.