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Finding the Fourth Proportional to 949.74, 1,423.29 and 718.44

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Solution

The fourth proportional to 949.74, 1,423.29 and 718.44 is: 1,076.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    949.74 : 1,423.29 = 718.44 : x
  2. Step 2: Convert to fraction form
    949.74/1,423.29 = 718.44/x
  3. Step 3: Cross multiply
    949.74x = 1,423.29 × 718.44
  4. Step 4: Simplify right side
    949.74x = 1,022,548.47
  5. Step 5: Solve for x
    x = 1,022,548.47/949.74
  6. Step 6: Final answer
    x = 1,076.66

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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.