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Finding the Fourth Proportional to 648.90, 966.51 and 635.40

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Solution

The fourth proportional to 648.90, 966.51 and 635.40 is: 946.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    648.90 : 966.51 = 635.40 : x
  2. Step 2: Convert to fraction form
    648.90/966.51 = 635.40/x
  3. Step 3: Cross multiply
    648.90x = 966.51 × 635.40
  4. Step 4: Simplify right side
    648.90x = 614,120.45
  5. Step 5: Solve for x
    x = 614,120.45/648.90
  6. Step 6: Final answer
    x = 946.40

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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.