Home / 678,286.76-936,039.36-423,785.56

Finding the Fourth Proportional to 678,286.76, 936,039.36 and 423,785.56

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Solution

The fourth proportional to 678,286.76, 936,039.36 and 423,785.56 is: 584,826.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,286.76 : 936,039.36 = 423,785.56 : x
  2. Step 2: Convert to fraction form
    678,286.76/936,039.36 = 423,785.56/x
  3. Step 3: Cross multiply
    678,286.76x = 936,039.36 × 423,785.56
  4. Step 4: Simplify right side
    678,286.76x = 396,679,964,359.64
  5. Step 5: Solve for x
    x = 396,679,964,359.64/678,286.76
  6. Step 6: Final answer
    x = 584,826.34

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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.