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Finding the Fourth Proportional to 968.80, 1,336.60 and 549.08

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Solution

The fourth proportional to 968.80, 1,336.60 and 549.08 is: 757.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    968.80 : 1,336.60 = 549.08 : x
  2. Step 2: Convert to fraction form
    968.80/1,336.60 = 549.08/x
  3. Step 3: Cross multiply
    968.80x = 1,336.60 × 549.08
  4. Step 4: Simplify right side
    968.80x = 733,900.33
  5. Step 5: Solve for x
    x = 733,900.33/968.80
  6. Step 6: Final answer
    x = 757.54

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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.