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Finding the Fourth Proportional to 551.47, 755.52 and 530.72

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Solution

The fourth proportional to 551.47, 755.52 and 530.72 is: 727.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    551.47 : 755.52 = 530.72 : x
  2. Step 2: Convert to fraction form
    551.47/755.52 = 530.72/x
  3. Step 3: Cross multiply
    551.47x = 755.52 × 530.72
  4. Step 4: Simplify right side
    551.47x = 400,965.80
  5. Step 5: Solve for x
    x = 400,965.80/551.47
  6. Step 6: Final answer
    x = 727.09

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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.