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Finding the Fourth Proportional to 825.07, 1,138.02 and 493.24

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Solution

The fourth proportional to 825.07, 1,138.02 and 493.24 is: 680.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    825.07 : 1,138.02 = 493.24 : x
  2. Step 2: Convert to fraction form
    825.07/1,138.02 = 493.24/x
  3. Step 3: Cross multiply
    825.07x = 1,138.02 × 493.24
  4. Step 4: Simplify right side
    825.07x = 561,316.98
  5. Step 5: Solve for x
    x = 561,316.98/825.07
  6. Step 6: Final answer
    x = 680.33

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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.