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Finding the Fourth Proportional to 627.68, 940.60 and 454.71

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Solution

The fourth proportional to 627.68, 940.60 and 454.71 is: 681.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    627.68 : 940.60 = 454.71 : x
  2. Step 2: Convert to fraction form
    627.68/940.60 = 454.71/x
  3. Step 3: Cross multiply
    627.68x = 940.60 × 454.71
  4. Step 4: Simplify right side
    627.68x = 427,701.76
  5. Step 5: Solve for x
    x = 427,701.76/627.68
  6. Step 6: Final answer
    x = 681.40

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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.