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Finding the Fourth Proportional to 864.33, 1,193.04 and 628.31

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Solution

The fourth proportional to 864.33, 1,193.04 and 628.31 is: 867.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    864.33 : 1,193.04 = 628.31 : x
  2. Step 2: Convert to fraction form
    864.33/1,193.04 = 628.31/x
  3. Step 3: Cross multiply
    864.33x = 1,193.04 × 628.31
  4. Step 4: Simplify right side
    864.33x = 749,593.00
  5. Step 5: Solve for x
    x = 749,593.00/864.33
  6. Step 6: Final answer
    x = 867.25

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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.