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Finding the Fourth Proportional to 825.97, 1,239.74 and 306.47

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Solution

The fourth proportional to 825.97, 1,239.74 and 306.47 is: 460.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    825.97 : 1,239.74 = 306.47 : x
  2. Step 2: Convert to fraction form
    825.97/1,239.74 = 306.47/x
  3. Step 3: Cross multiply
    825.97x = 1,239.74 × 306.47
  4. Step 4: Simplify right side
    825.97x = 379,943.12
  5. Step 5: Solve for x
    x = 379,943.12/825.97
  6. Step 6: Final answer
    x = 460.00

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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.