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Finding the Fourth Proportional to 640.71, 884.52 and 627.35

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Solution

The fourth proportional to 640.71, 884.52 and 627.35 is: 866.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    640.71 : 884.52 = 627.35 : x
  2. Step 2: Convert to fraction form
    640.71/884.52 = 627.35/x
  3. Step 3: Cross multiply
    640.71x = 884.52 × 627.35
  4. Step 4: Simplify right side
    640.71x = 554,899.20
  5. Step 5: Solve for x
    x = 554,899.20/640.71
  6. Step 6: Final answer
    x = 866.07

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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.