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Finding the Fourth Proportional to 711.09, 1,067.09 and 480.06

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Solution

The fourth proportional to 711.09, 1,067.09 and 480.06 is: 720.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    711.09 : 1,067.09 = 480.06 : x
  2. Step 2: Convert to fraction form
    711.09/1,067.09 = 480.06/x
  3. Step 3: Cross multiply
    711.09x = 1,067.09 × 480.06
  4. Step 4: Simplify right side
    711.09x = 512,264.83
  5. Step 5: Solve for x
    x = 512,264.83/711.09
  6. Step 6: Final answer
    x = 720.39

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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.