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Finding the Fourth Proportional to 825.94, 1,239.12 and 248.81

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Solution

The fourth proportional to 825.94, 1,239.12 and 248.81 is: 373.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    825.94 : 1,239.12 = 248.81 : x
  2. Step 2: Convert to fraction form
    825.94/1,239.12 = 248.81/x
  3. Step 3: Cross multiply
    825.94x = 1,239.12 × 248.81
  4. Step 4: Simplify right side
    825.94x = 308,308.55
  5. Step 5: Solve for x
    x = 308,308.55/825.94
  6. Step 6: Final answer
    x = 373.28

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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.