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Finding the Fourth Proportional to 722.42, 997.19 and 427.65

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Solution

The fourth proportional to 722.42, 997.19 and 427.65 is: 590.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    722.42 : 997.19 = 427.65 : x
  2. Step 2: Convert to fraction form
    722.42/997.19 = 427.65/x
  3. Step 3: Cross multiply
    722.42x = 997.19 × 427.65
  4. Step 4: Simplify right side
    722.42x = 426,446.17
  5. Step 5: Solve for x
    x = 426,446.17/722.42
  6. Step 6: Final answer
    x = 590.31

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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.