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Finding the Fourth Proportional to 771.05, 1,156.48 and 251.01

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Solution

The fourth proportional to 771.05, 1,156.48 and 251.01 is: 376.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    771.05 : 1,156.48 = 251.01 : x
  2. Step 2: Convert to fraction form
    771.05/1,156.48 = 251.01/x
  3. Step 3: Cross multiply
    771.05x = 1,156.48 × 251.01
  4. Step 4: Simplify right side
    771.05x = 290,284.16
  5. Step 5: Solve for x
    x = 290,284.16/771.05
  6. Step 6: Final answer
    x = 376.48

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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.