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Finding the Fourth Proportional to 669,064.86, 923,323.25 and 378,676.42

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Solution

The fourth proportional to 669,064.86, 923,323.25 and 378,676.42 is: 522,581.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    669,064.86 : 923,323.25 = 378,676.42 : x
  2. Step 2: Convert to fraction form
    669,064.86/923,323.25 = 378,676.42/x
  3. Step 3: Cross multiply
    669,064.86x = 923,323.25 × 378,676.42
  4. Step 4: Simplify right side
    669,064.86x = 349,640,741,451.15
  5. Step 5: Solve for x
    x = 349,640,741,451.15/669,064.86
  6. Step 6: Final answer
    x = 522,581.24

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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.