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Finding the Fourth Proportional to 551.72, 755.86 and 530.97

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Solution

The fourth proportional to 551.72, 755.86 and 530.97 is: 727.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    551.72 : 755.86 = 530.97 : x
  2. Step 2: Convert to fraction form
    551.72/755.86 = 530.97/x
  3. Step 3: Cross multiply
    551.72x = 755.86 × 530.97
  4. Step 4: Simplify right side
    551.72x = 401,336.53
  5. Step 5: Solve for x
    x = 401,336.53/551.72
  6. Step 6: Final answer
    x = 727.43

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.