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Finding the Fourth Proportional to 669,004.80, 923,157.12 and 378,648.96

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Solution

The fourth proportional to 669,004.80, 923,157.12 and 378,648.96 is: 522,496.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    669,004.80 : 923,157.12 = 378,648.96 : x
  2. Step 2: Convert to fraction form
    669,004.80/923,157.12 = 378,648.96/x
  3. Step 3: Cross multiply
    669,004.80x = 923,157.12 × 378,648.96
  4. Step 4: Simplify right side
    669,004.80x = 349,552,483,404.60
  5. Step 5: Solve for x
    x = 349,552,483,404.60/669,004.80
  6. Step 6: Final answer
    x = 522,496.23

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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.