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Finding the Fourth Proportional to 377.05, 564.65 and 261.16

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Solution

The fourth proportional to 377.05, 564.65 and 261.16 is: 391.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    377.05 : 564.65 = 261.16 : x
  2. Step 2: Convert to fraction form
    377.05/564.65 = 261.16/x
  3. Step 3: Cross multiply
    377.05x = 564.65 × 261.16
  4. Step 4: Simplify right side
    377.05x = 147,463.99
  5. Step 5: Solve for x
    x = 147,463.99/377.05
  6. Step 6: Final answer
    x = 391.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.