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Finding the Fourth Proportional to 1,209.16, 1,671.99 and 960.04

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Solution

The fourth proportional to 1,209.16, 1,671.99 and 960.04 is: 1,327.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,209.16 : 1,671.99 = 960.04 : x
  2. Step 2: Convert to fraction form
    1,209.16/1,671.99 = 960.04/x
  3. Step 3: Cross multiply
    1,209.16x = 1,671.99 × 960.04
  4. Step 4: Simplify right side
    1,209.16x = 1,605,169.50
  5. Step 5: Solve for x
    x = 1,605,169.50/1,209.16
  6. Step 6: Final answer
    x = 1,327.51

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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.