Home / 1,290.28-1,778.01-935.59

Finding the Fourth Proportional to 1,290.28, 1,778.01 and 935.59

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Solution

The fourth proportional to 1,290.28, 1,778.01 and 935.59 is: 1,289.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290.28 : 1,778.01 = 935.59 : x
  2. Step 2: Convert to fraction form
    1,290.28/1,778.01 = 935.59/x
  3. Step 3: Cross multiply
    1,290.28x = 1,778.01 × 935.59
  4. Step 4: Simplify right side
    1,290.28x = 1,663,488.38
  5. Step 5: Solve for x
    x = 1,663,488.38/1,290.28
  6. Step 6: Final answer
    x = 1,289.25

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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.