Home / 1,238.23-1,710.15-961.79

Finding the Fourth Proportional to 1,238.23, 1,710.15 and 961.79

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Solution

The fourth proportional to 1,238.23, 1,710.15 and 961.79 is: 1,328.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,238.23 : 1,710.15 = 961.79 : x
  2. Step 2: Convert to fraction form
    1,238.23/1,710.15 = 961.79/x
  3. Step 3: Cross multiply
    1,238.23x = 1,710.15 × 961.79
  4. Step 4: Simplify right side
    1,238.23x = 1,644,805.17
  5. Step 5: Solve for x
    x = 1,644,805.17/1,238.23
  6. Step 6: Final answer
    x = 1,328.36

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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.