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Finding the Fourth Proportional to 669,447.90, 923,528.43 and 397,360.80

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Solution

The fourth proportional to 669,447.90, 923,528.43 and 397,360.80 is: 548,174.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    669,447.90 : 923,528.43 = 397,360.80 : x
  2. Step 2: Convert to fraction form
    669,447.90/923,528.43 = 397,360.80/x
  3. Step 3: Cross multiply
    669,447.90x = 923,528.43 × 397,360.80
  4. Step 4: Simplify right side
    669,447.90x = 366,973,995,767.54
  5. Step 5: Solve for x
    x = 366,973,995,767.54/669,447.90
  6. Step 6: Final answer
    x = 548,174.09

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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.