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Finding the Fourth Proportional to 551.30, 825.86 and 455.18

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Solution

The fourth proportional to 551.30, 825.86 and 455.18 is: 681.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    551.30 : 825.86 = 455.18 : x
  2. Step 2: Convert to fraction form
    551.30/825.86 = 455.18/x
  3. Step 3: Cross multiply
    551.30x = 825.86 × 455.18
  4. Step 4: Simplify right side
    551.30x = 375,911.96
  5. Step 5: Solve for x
    x = 375,911.96/551.30
  6. Step 6: Final answer
    x = 681.87

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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.