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Finding the Fourth Proportional to 419,469.60, 626,035.36 and 391,027.64

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Solution

The fourth proportional to 419,469.60, 626,035.36 and 391,027.64 is: 583,587.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,469.60 : 626,035.36 = 391,027.64 : x
  2. Step 2: Convert to fraction form
    419,469.60/626,035.36 = 391,027.64/x
  3. Step 3: Cross multiply
    419,469.60x = 626,035.36 × 391,027.64
  4. Step 4: Simplify right side
    419,469.60x = 244,797,129,377.35
  5. Step 5: Solve for x
    x = 244,797,129,377.35/419,469.60
  6. Step 6: Final answer
    x = 583,587.30

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.