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Finding the Fourth Proportional to 643.13, 959.05 and 637.29

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Solution

The fourth proportional to 643.13, 959.05 and 637.29 is: 950.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    643.13 : 959.05 = 637.29 : x
  2. Step 2: Convert to fraction form
    643.13/959.05 = 637.29/x
  3. Step 3: Cross multiply
    643.13x = 959.05 × 637.29
  4. Step 4: Simplify right side
    643.13x = 611,188.18
  5. Step 5: Solve for x
    x = 611,188.18/643.13
  6. Step 6: Final answer
    x = 950.33

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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.