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Finding the Fourth Proportional to 1,072.41, 1,478.97 and 674.12

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Solution

The fourth proportional to 1,072.41, 1,478.97 and 674.12 is: 929.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,072.41 : 1,478.97 = 674.12 : x
  2. Step 2: Convert to fraction form
    1,072.41/1,478.97 = 674.12/x
  3. Step 3: Cross multiply
    1,072.41x = 1,478.97 × 674.12
  4. Step 4: Simplify right side
    1,072.41x = 996,995.86
  5. Step 5: Solve for x
    x = 996,995.86/1,072.41
  6. Step 6: Final answer
    x = 929.68

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.