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Finding the Fourth Proportional to 711.72, 1,067.58 and 608.65

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Solution

The fourth proportional to 711.72, 1,067.58 and 608.65 is: 912.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    711.72 : 1,067.58 = 608.65 : x
  2. Step 2: Convert to fraction form
    711.72/1,067.58 = 608.65/x
  3. Step 3: Cross multiply
    711.72x = 1,067.58 × 608.65
  4. Step 4: Simplify right side
    711.72x = 649,779.90
  5. Step 5: Solve for x
    x = 649,779.90/711.72
  6. Step 6: Final answer
    x = 912.97

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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.