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Finding the Fourth Proportional to 663.18, 913.44 and 659.53

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Solution

The fourth proportional to 663.18, 913.44 and 659.53 is: 908.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    663.18 : 913.44 = 659.53 : x
  2. Step 2: Convert to fraction form
    663.18/913.44 = 659.53/x
  3. Step 3: Cross multiply
    663.18x = 913.44 × 659.53
  4. Step 4: Simplify right side
    663.18x = 602,441.08
  5. Step 5: Solve for x
    x = 602,441.08/663.18
  6. Step 6: Final answer
    x = 908.41

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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.