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Finding the Fourth Proportional to 551.76, 762.12 and 454.56

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Solution

The fourth proportional to 551.76, 762.12 and 454.56 is: 627.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    551.76 : 762.12 = 454.56 : x
  2. Step 2: Convert to fraction form
    551.76/762.12 = 454.56/x
  3. Step 3: Cross multiply
    551.76x = 762.12 × 454.56
  4. Step 4: Simplify right side
    551.76x = 346,429.27
  5. Step 5: Solve for x
    x = 346,429.27/551.76
  6. Step 6: Final answer
    x = 627.86

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.