Home / 1,127.88-1,684.40-961.56

Finding the Fourth Proportional to 1,127.88, 1,684.40 and 961.56

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Solution

The fourth proportional to 1,127.88, 1,684.40 and 961.56 is: 1,436.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,127.88 : 1,684.40 = 961.56 : x
  2. Step 2: Convert to fraction form
    1,127.88/1,684.40 = 961.56/x
  3. Step 3: Cross multiply
    1,127.88x = 1,684.40 × 961.56
  4. Step 4: Simplify right side
    1,127.88x = 1,619,646.86
  5. Step 5: Solve for x
    x = 1,619,646.86/1,127.88
  6. Step 6: Final answer
    x = 1,436.01

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.