Home / 918,796.56-1,378,194.84-287,759.76

Finding the Fourth Proportional to 918,796.56, 1,378,194.84 and 287,759.76

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Solution

The fourth proportional to 918,796.56, 1,378,194.84 and 287,759.76 is: 431,639.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    918,796.56 : 1,378,194.84 = 287,759.76 : x
  2. Step 2: Convert to fraction form
    918,796.56/1,378,194.84 = 287,759.76/x
  3. Step 3: Cross multiply
    918,796.56x = 1,378,194.84 × 287,759.76
  4. Step 4: Simplify right side
    918,796.56x = 396,589,016,391.64
  5. Step 5: Solve for x
    x = 396,589,016,391.64/918,796.56
  6. Step 6: Final answer
    x = 431,639.64

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.