Home / 1,551.32-2,139.96-961.48

Finding the Fourth Proportional to 1,551.32, 2,139.96 and 961.48

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Solution

The fourth proportional to 1,551.32, 2,139.96 and 961.48 is: 1,326.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,551.32 : 2,139.96 = 961.48 : x
  2. Step 2: Convert to fraction form
    1,551.32/2,139.96 = 961.48/x
  3. Step 3: Cross multiply
    1,551.32x = 2,139.96 × 961.48
  4. Step 4: Simplify right side
    1,551.32x = 2,057,528.74
  5. Step 5: Solve for x
    x = 2,057,528.74/1,551.32
  6. Step 6: Final answer
    x = 1,326.31

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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.