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Finding the Fourth Proportional to 641.68, 968.27 and 618.80

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Solution

The fourth proportional to 641.68, 968.27 and 618.80 is: 933.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    641.68 : 968.27 = 618.80 : x
  2. Step 2: Convert to fraction form
    641.68/968.27 = 618.80/x
  3. Step 3: Cross multiply
    641.68x = 968.27 × 618.80
  4. Step 4: Simplify right side
    641.68x = 599,157.54
  5. Step 5: Solve for x
    x = 599,157.54/641.68
  6. Step 6: Final answer
    x = 933.74

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.