Home / 1,286.40-1,774.20-932.37

Finding the Fourth Proportional to 1,286.40, 1,774.20 and 932.37

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Solution

The fourth proportional to 1,286.40, 1,774.20 and 932.37 is: 1,285.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,286.40 : 1,774.20 = 932.37 : x
  2. Step 2: Convert to fraction form
    1,286.40/1,774.20 = 932.37/x
  3. Step 3: Cross multiply
    1,286.40x = 1,774.20 × 932.37
  4. Step 4: Simplify right side
    1,286.40x = 1,654,210.85
  5. Step 5: Solve for x
    x = 1,654,210.85/1,286.40
  6. Step 6: Final answer
    x = 1,285.92

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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.