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Finding the Fourth Proportional to 1,239.16, 1,710.16 and 773.48

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Solution

The fourth proportional to 1,239.16, 1,710.16 and 773.48 is: 1,067.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,239.16 : 1,710.16 = 773.48 : x
  2. Step 2: Convert to fraction form
    1,239.16/1,710.16 = 773.48/x
  3. Step 3: Cross multiply
    1,239.16x = 1,710.16 × 773.48
  4. Step 4: Simplify right side
    1,239.16x = 1,322,774.56
  5. Step 5: Solve for x
    x = 1,322,774.56/1,239.16
  6. Step 6: Final answer
    x = 1,067.48

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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.