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Finding the Fourth Proportional to 722.75, 1,088.62 and 672.06

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Solution

The fourth proportional to 722.75, 1,088.62 and 672.06 is: 1,012.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    722.75 : 1,088.62 = 672.06 : x
  2. Step 2: Convert to fraction form
    722.75/1,088.62 = 672.06/x
  3. Step 3: Cross multiply
    722.75x = 1,088.62 × 672.06
  4. Step 4: Simplify right side
    722.75x = 731,614.19
  5. Step 5: Solve for x
    x = 731,614.19/722.75
  6. Step 6: Final answer
    x = 1,012.27

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.