Home / 1,425.28-1,965.08-1,212.38

Finding the Fourth Proportional to 1,425.28, 1,965.08 and 1,212.38

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Solution

The fourth proportional to 1,425.28, 1,965.08 and 1,212.38 is: 1,671.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,425.28 : 1,965.08 = 1,212.38 : x
  2. Step 2: Convert to fraction form
    1,425.28/1,965.08 = 1,212.38/x
  3. Step 3: Cross multiply
    1,425.28x = 1,965.08 × 1,212.38
  4. Step 4: Simplify right side
    1,425.28x = 2,382,431.63
  5. Step 5: Solve for x
    x = 2,382,431.63/1,425.28
  6. Step 6: Final answer
    x = 1,671.56

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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.