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Finding the Fourth Proportional to 773.51, 1,160.42 and 253.55

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Solution

The fourth proportional to 773.51, 1,160.42 and 253.55 is: 380.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    773.51 : 1,160.42 = 253.55 : x
  2. Step 2: Convert to fraction form
    773.51/1,160.42 = 253.55/x
  3. Step 3: Cross multiply
    773.51x = 1,160.42 × 253.55
  4. Step 4: Simplify right side
    773.51x = 294,226.12
  5. Step 5: Solve for x
    x = 294,226.12/773.51
  6. Step 6: Final answer
    x = 380.38

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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.