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Finding the Fourth Proportional to 1,202.61, 1,659.86 and 760.42

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Solution

The fourth proportional to 1,202.61, 1,659.86 and 760.42 is: 1,049.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,202.61 : 1,659.86 = 760.42 : x
  2. Step 2: Convert to fraction form
    1,202.61/1,659.86 = 760.42/x
  3. Step 3: Cross multiply
    1,202.61x = 1,659.86 × 760.42
  4. Step 4: Simplify right side
    1,202.61x = 1,262,190.74
  5. Step 5: Solve for x
    x = 1,262,190.74/1,202.61
  6. Step 6: Final answer
    x = 1,049.54

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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.