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Finding the Fourth Proportional to 825.91, 1,139.75 and 466.98

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Solution

The fourth proportional to 825.91, 1,139.75 and 466.98 is: 644.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    825.91 : 1,139.75 = 466.98 : x
  2. Step 2: Convert to fraction form
    825.91/1,139.75 = 466.98/x
  3. Step 3: Cross multiply
    825.91x = 1,139.75 × 466.98
  4. Step 4: Simplify right side
    825.91x = 532,238.22
  5. Step 5: Solve for x
    x = 532,238.22/825.91
  6. Step 6: Final answer
    x = 644.43

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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.