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Finding the Fourth Proportional to 425,527.60, 638,521.80 and 188,906.80

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Solution

The fourth proportional to 425,527.60, 638,521.80 and 188,906.80 is: 283,462.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,527.60 : 638,521.80 = 188,906.80 : x
  2. Step 2: Convert to fraction form
    425,527.60/638,521.80 = 188,906.80/x
  3. Step 3: Cross multiply
    425,527.60x = 638,521.80 × 188,906.80
  4. Step 4: Simplify right side
    425,527.60x = 120,621,109,968.24
  5. Step 5: Solve for x
    x = 120,621,109,968.24/425,527.60
  6. Step 6: Final answer
    x = 283,462.48

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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.