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Finding the Fourth Proportional to 984.75, 1,354.89 and 960.45

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Solution

The fourth proportional to 984.75, 1,354.89 and 960.45 is: 1,321.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    984.75 : 1,354.89 = 960.45 : x
  2. Step 2: Convert to fraction form
    984.75/1,354.89 = 960.45/x
  3. Step 3: Cross multiply
    984.75x = 1,354.89 × 960.45
  4. Step 4: Simplify right side
    984.75x = 1,301,304.10
  5. Step 5: Solve for x
    x = 1,301,304.10/984.75
  6. Step 6: Final answer
    x = 1,321.46

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1.5x scale

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.