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Finding the Fourth Proportional to 949.56, 1,423.78 and 401.46

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Solution

The fourth proportional to 949.56, 1,423.78 and 401.46 is: 601.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    949.56 : 1,423.78 = 401.46 : x
  2. Step 2: Convert to fraction form
    949.56/1,423.78 = 401.46/x
  3. Step 3: Cross multiply
    949.56x = 1,423.78 × 401.46
  4. Step 4: Simplify right side
    949.56x = 571,584.38
  5. Step 5: Solve for x
    x = 571,584.38/949.56
  6. Step 6: Final answer
    x = 601.95

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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.