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Finding the Fourth Proportional to 864.31, 1,193.85 and 603.49

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Solution

The fourth proportional to 864.31, 1,193.85 and 603.49 is: 833.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    864.31 : 1,193.85 = 603.49 : x
  2. Step 2: Convert to fraction form
    864.31/1,193.85 = 603.49/x
  3. Step 3: Cross multiply
    864.31x = 1,193.85 × 603.49
  4. Step 4: Simplify right side
    864.31x = 720,467.55
  5. Step 5: Solve for x
    x = 720,467.55/864.31
  6. Step 6: Final answer
    x = 833.58

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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.