Home / 1,242.61-1,713.67-961.95

Finding the Fourth Proportional to 1,242.61, 1,713.67 and 961.95

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Solution

The fourth proportional to 1,242.61, 1,713.67 and 961.95 is: 1,326.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,242.61 : 1,713.67 = 961.95 : x
  2. Step 2: Convert to fraction form
    1,242.61/1,713.67 = 961.95/x
  3. Step 3: Cross multiply
    1,242.61x = 1,713.67 × 961.95
  4. Step 4: Simplify right side
    1,242.61x = 1,648,464.86
  5. Step 5: Solve for x
    x = 1,648,464.86/1,242.61
  6. Step 6: Final answer
    x = 1,326.61

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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.