Home / 669,067.28-923,326.58-378,678.84

Finding the Fourth Proportional to 669,067.28, 923,326.58 and 378,678.84

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Solution

The fourth proportional to 669,067.28, 923,326.58 and 378,678.84 is: 522,584.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    669,067.28 : 923,326.58 = 378,678.84 : x
  2. Step 2: Convert to fraction form
    669,067.28/923,326.58 = 378,678.84/x
  3. Step 3: Cross multiply
    669,067.28x = 923,326.58 × 378,678.84
  4. Step 4: Simplify right side
    669,067.28x = 349,644,238,255.57
  5. Step 5: Solve for x
    x = 349,644,238,255.57/669,067.28
  6. Step 6: Final answer
    x = 522,584.57

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Half scale
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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.