Home / 1,660.19-2,290.51-961.07

Finding the Fourth Proportional to 1,660.19, 2,290.51 and 961.07

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Solution

The fourth proportional to 1,660.19, 2,290.51 and 961.07 is: 1,325.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,660.19 : 2,290.51 = 961.07 : x
  2. Step 2: Convert to fraction form
    1,660.19/2,290.51 = 961.07/x
  3. Step 3: Cross multiply
    1,660.19x = 2,290.51 × 961.07
  4. Step 4: Simplify right side
    1,660.19x = 2,201,340.45
  5. Step 5: Solve for x
    x = 2,201,340.45/1,660.19
  6. Step 6: Final answer
    x = 1,325.96

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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.