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Finding the Fourth Proportional to 1,659.75, 2,290.47 and 961.14

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Solution

The fourth proportional to 1,659.75, 2,290.47 and 961.14 is: 1,326.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,659.75 : 2,290.47 = 961.14 : x
  2. Step 2: Convert to fraction form
    1,659.75/2,290.47 = 961.14/x
  3. Step 3: Cross multiply
    1,659.75x = 2,290.47 × 961.14
  4. Step 4: Simplify right side
    1,659.75x = 2,201,462.34
  5. Step 5: Solve for x
    x = 2,201,462.34/1,659.75
  6. Step 6: Final answer
    x = 1,326.38

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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.