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Finding the Fourth Proportional to 641.49, 968.01 and 618.60

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Solution

The fourth proportional to 641.49, 968.01 and 618.60 is: 933.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    641.49 : 968.01 = 618.60 : x
  2. Step 2: Convert to fraction form
    641.49/968.01 = 618.60/x
  3. Step 3: Cross multiply
    641.49x = 968.01 × 618.60
  4. Step 4: Simplify right side
    641.49x = 598,810.99
  5. Step 5: Solve for x
    x = 598,810.99/641.49
  6. Step 6: Final answer
    x = 933.47

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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.