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Finding the Fourth Proportional to 551.26, 760.89 and 426.79

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Solution

The fourth proportional to 551.26, 760.89 and 426.79 is: 589.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    551.26 : 760.89 = 426.79 : x
  2. Step 2: Convert to fraction form
    551.26/760.89 = 426.79/x
  3. Step 3: Cross multiply
    551.26x = 760.89 × 426.79
  4. Step 4: Simplify right side
    551.26x = 324,740.24
  5. Step 5: Solve for x
    x = 324,740.24/551.26
  6. Step 6: Final answer
    x = 589.09

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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.