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Finding the Fourth Proportional to 771.38, 1,156.48 and 360.46

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Solution

The fourth proportional to 771.38, 1,156.48 and 360.46 is: 540.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    771.38 : 1,156.48 = 360.46 : x
  2. Step 2: Convert to fraction form
    771.38/1,156.48 = 360.46/x
  3. Step 3: Cross multiply
    771.38x = 1,156.48 × 360.46
  4. Step 4: Simplify right side
    771.38x = 416,864.78
  5. Step 5: Solve for x
    x = 416,864.78/771.38
  6. Step 6: Final answer
    x = 540.41

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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.