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Finding the Fourth Proportional to 663.80, 916.00 and 369.03

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Solution

The fourth proportional to 663.80, 916.00 and 369.03 is: 509.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    663.80 : 916.00 = 369.03 : x
  2. Step 2: Convert to fraction form
    663.80/916.00 = 369.03/x
  3. Step 3: Cross multiply
    663.80x = 916.00 × 369.03
  4. Step 4: Simplify right side
    663.80x = 338,030.56
  5. Step 5: Solve for x
    x = 338,030.56/663.80
  6. Step 6: Final answer
    x = 509.23

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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.