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Finding the Fourth Proportional to 391,027.60, 548,913.20 and 391,027.60

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Solution

The fourth proportional to 391,027.60, 548,913.20 and 391,027.60 is: 548,913.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,027.60 : 548,913.20 = 391,027.60 : x
  2. Step 2: Convert to fraction form
    391,027.60/548,913.20 = 391,027.60/x
  3. Step 3: Cross multiply
    391,027.60x = 548,913.20 × 391,027.60
  4. Step 4: Simplify right side
    391,027.60x = 214,640,211,204.32
  5. Step 5: Solve for x
    x = 214,640,211,204.32/391,027.60
  6. Step 6: Final answer
    x = 548,913.20

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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.