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Finding the Fourth Proportional to 640.91, 954.45 and 627.24

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Solution

The fourth proportional to 640.91, 954.45 and 627.24 is: 934.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    640.91 : 954.45 = 627.24 : x
  2. Step 2: Convert to fraction form
    640.91/954.45 = 627.24/x
  3. Step 3: Cross multiply
    640.91x = 954.45 × 627.24
  4. Step 4: Simplify right side
    640.91x = 598,669.22
  5. Step 5: Solve for x
    x = 598,669.22/640.91
  6. Step 6: Final answer
    x = 934.10

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.