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Finding the Fourth Proportional to 968.49, 1,336.91 and 619.11

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Solution

The fourth proportional to 968.49, 1,336.91 and 619.11 is: 854.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    968.49 : 1,336.91 = 619.11 : x
  2. Step 2: Convert to fraction form
    968.49/1,336.91 = 619.11/x
  3. Step 3: Cross multiply
    968.49x = 1,336.91 × 619.11
  4. Step 4: Simplify right side
    968.49x = 827,691.25
  5. Step 5: Solve for x
    x = 827,691.25/968.49
  6. Step 6: Final answer
    x = 854.62

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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.