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Finding the Fourth Proportional to 824.17, 1,138.11 and 529.94

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Solution

The fourth proportional to 824.17, 1,138.11 and 529.94 is: 731.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    824.17 : 1,138.11 = 529.94 : x
  2. Step 2: Convert to fraction form
    824.17/1,138.11 = 529.94/x
  3. Step 3: Cross multiply
    824.17x = 1,138.11 × 529.94
  4. Step 4: Simplify right side
    824.17x = 603,130.01
  5. Step 5: Solve for x
    x = 603,130.01/824.17
  6. Step 6: Final answer
    x = 731.81

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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.