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Finding the Fourth Proportional to 968.30, 1,335.90 and 548.60

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Solution

The fourth proportional to 968.30, 1,335.90 and 548.60 is: 756.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    968.30 : 1,335.90 = 548.60 : x
  2. Step 2: Convert to fraction form
    968.30/1,335.90 = 548.60/x
  3. Step 3: Cross multiply
    968.30x = 1,335.90 × 548.60
  4. Step 4: Simplify right side
    968.30x = 732,874.74
  5. Step 5: Solve for x
    x = 732,874.74/968.30
  6. Step 6: Final answer
    x = 756.87

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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.