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Finding the Fourth Proportional to 669.82, 923.55 and 565.30

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Solution

The fourth proportional to 669.82, 923.55 and 565.30 is: 779.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    669.82 : 923.55 = 565.30 : x
  2. Step 2: Convert to fraction form
    669.82/923.55 = 565.30/x
  3. Step 3: Cross multiply
    669.82x = 923.55 × 565.30
  4. Step 4: Simplify right side
    669.82x = 522,082.82
  5. Step 5: Solve for x
    x = 522,082.82/669.82
  6. Step 6: Final answer
    x = 779.44

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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.