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Finding the Fourth Proportional to 773.55, 1,067.18 and 511.11

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Solution

The fourth proportional to 773.55, 1,067.18 and 511.11 is: 705.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    773.55 : 1,067.18 = 511.11 : x
  2. Step 2: Convert to fraction form
    773.55/1,067.18 = 511.11/x
  3. Step 3: Cross multiply
    773.55x = 1,067.18 × 511.11
  4. Step 4: Simplify right side
    773.55x = 545,443.81
  5. Step 5: Solve for x
    x = 545,443.81/773.55
  6. Step 6: Final answer
    x = 705.12

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.