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Finding the Fourth Proportional to 551.72, 826.26 and 403.07

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Solution

The fourth proportional to 551.72, 826.26 and 403.07 is: 603.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    551.72 : 826.26 = 403.07 : x
  2. Step 2: Convert to fraction form
    551.72/826.26 = 403.07/x
  3. Step 3: Cross multiply
    551.72x = 826.26 × 403.07
  4. Step 4: Simplify right side
    551.72x = 333,040.62
  5. Step 5: Solve for x
    x = 333,040.62/551.72
  6. Step 6: Final answer
    x = 603.64

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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.