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Finding the Fourth Proportional to 663.32, 908.31 and 637.18

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Solution

The fourth proportional to 663.32, 908.31 and 637.18 is: 872.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    663.32 : 908.31 = 637.18 : x
  2. Step 2: Convert to fraction form
    663.32/908.31 = 637.18/x
  3. Step 3: Cross multiply
    663.32x = 908.31 × 637.18
  4. Step 4: Simplify right side
    663.32x = 578,751.51
  5. Step 5: Solve for x
    x = 578,751.51/663.32
  6. Step 6: Final answer
    x = 872.51

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.