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Finding the Fourth Proportional to 425,532.60, 638,529.30 and 188,911.80

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Solution

The fourth proportional to 425,532.60, 638,529.30 and 188,911.80 is: 283,469.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,532.60 : 638,529.30 = 188,911.80 : x
  2. Step 2: Convert to fraction form
    425,532.60/638,529.30 = 188,911.80/x
  3. Step 3: Cross multiply
    425,532.60x = 638,529.30 × 188,911.80
  4. Step 4: Simplify right side
    425,532.60x = 120,625,719,415.74
  5. Step 5: Solve for x
    x = 120,625,719,415.74/425,532.60
  6. Step 6: Final answer
    x = 283,469.98

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.