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Finding the Fourth Proportional to 551.26, 826.45 and 319.88

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Solution

The fourth proportional to 551.26, 826.45 and 319.88 is: 479.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    551.26 : 826.45 = 319.88 : x
  2. Step 2: Convert to fraction form
    551.26/826.45 = 319.88/x
  3. Step 3: Cross multiply
    551.26x = 826.45 × 319.88
  4. Step 4: Simplify right side
    551.26x = 264,364.83
  5. Step 5: Solve for x
    x = 264,364.83/551.26
  6. Step 6: Final answer
    x = 479.56

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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.