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Finding the Fourth Proportional to 391,023.10, 548,906.90 and 391,023.10

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Solution

The fourth proportional to 391,023.10, 548,906.90 and 391,023.10 is: 548,906.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,023.10 : 548,906.90 = 391,023.10 : x
  2. Step 2: Convert to fraction form
    391,023.10/548,906.90 = 391,023.10/x
  3. Step 3: Cross multiply
    391,023.10x = 548,906.90 × 391,023.10
  4. Step 4: Simplify right side
    391,023.10x = 214,635,277,649.39
  5. Step 5: Solve for x
    x = 214,635,277,649.39/391,023.10
  6. Step 6: Final answer
    x = 548,906.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.