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Finding the Fourth Proportional to 1,203.89, 1,659.76 and 956.03

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Solution

The fourth proportional to 1,203.89, 1,659.76 and 956.03 is: 1,318.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,203.89 : 1,659.76 = 956.03 : x
  2. Step 2: Convert to fraction form
    1,203.89/1,659.76 = 956.03/x
  3. Step 3: Cross multiply
    1,203.89x = 1,659.76 × 956.03
  4. Step 4: Simplify right side
    1,203.89x = 1,586,769.66
  5. Step 5: Solve for x
    x = 1,586,769.66/1,203.89
  6. Step 6: Final answer
    x = 1,318.04

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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.