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Finding the Fourth Proportional to 663.89, 916.22 and 369.25

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Solution

The fourth proportional to 663.89, 916.22 and 369.25 is: 509.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    663.89 : 916.22 = 369.25 : x
  2. Step 2: Convert to fraction form
    663.89/916.22 = 369.25/x
  3. Step 3: Cross multiply
    663.89x = 916.22 × 369.25
  4. Step 4: Simplify right side
    663.89x = 338,314.24
  5. Step 5: Solve for x
    x = 338,314.24/663.89
  6. Step 6: Final answer
    x = 509.59

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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.