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Finding the Fourth Proportional to 711.55, 1,067.54 and 365.13

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Solution

The fourth proportional to 711.55, 1,067.54 and 365.13 is: 547.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    711.55 : 1,067.54 = 365.13 : x
  2. Step 2: Convert to fraction form
    711.55/1,067.54 = 365.13/x
  3. Step 3: Cross multiply
    711.55x = 1,067.54 × 365.13
  4. Step 4: Simplify right side
    711.55x = 389,789.05
  5. Step 5: Solve for x
    x = 389,789.05/711.55
  6. Step 6: Final answer
    x = 547.80

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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.