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Finding the Fourth Proportional to 1,485.34, 2,049.84 and 961.38

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Solution

The fourth proportional to 1,485.34, 2,049.84 and 961.38 is: 1,326.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,485.34 : 2,049.84 = 961.38 : x
  2. Step 2: Convert to fraction form
    1,485.34/2,049.84 = 961.38/x
  3. Step 3: Cross multiply
    1,485.34x = 2,049.84 × 961.38
  4. Step 4: Simplify right side
    1,485.34x = 1,970,675.18
  5. Step 5: Solve for x
    x = 1,970,675.18/1,485.34
  6. Step 6: Final answer
    x = 1,326.75

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1.5x scale

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.