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Finding the Fourth Proportional to 968.13, 1,335.50 and 613.41

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Solution

The fourth proportional to 968.13, 1,335.50 and 613.41 is: 846.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    968.13 : 1,335.50 = 613.41 : x
  2. Step 2: Convert to fraction form
    968.13/1,335.50 = 613.41/x
  3. Step 3: Cross multiply
    968.13x = 1,335.50 × 613.41
  4. Step 4: Simplify right side
    968.13x = 819,205.99
  5. Step 5: Solve for x
    x = 819,205.99/968.13
  6. Step 6: Final answer
    x = 846.17

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.