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Finding the Fourth Proportional to 949.71, 1,424.84 and 689.97

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Solution

The fourth proportional to 949.71, 1,424.84 and 689.97 is: 1,035.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    949.71 : 1,424.84 = 689.97 : x
  2. Step 2: Convert to fraction form
    949.71/1,424.84 = 689.97/x
  3. Step 3: Cross multiply
    949.71x = 1,424.84 × 689.97
  4. Step 4: Simplify right side
    949.71x = 983,096.85
  5. Step 5: Solve for x
    x = 983,096.85/949.71
  6. Step 6: Final answer
    x = 1,035.15

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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.