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Finding the Fourth Proportional to 771.39, 1,157.13 and 376.44

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Solution

The fourth proportional to 771.39, 1,157.13 and 376.44 is: 564.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    771.39 : 1,157.13 = 376.44 : x
  2. Step 2: Convert to fraction form
    771.39/1,157.13 = 376.44/x
  3. Step 3: Cross multiply
    771.39x = 1,157.13 × 376.44
  4. Step 4: Simplify right side
    771.39x = 435,590.02
  5. Step 5: Solve for x
    x = 435,590.02/771.39
  6. Step 6: Final answer
    x = 564.68

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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.