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Finding the Fourth Proportional to 687,084.48, 948,183.84 and 385,272

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Solution

The fourth proportional to 687,084.48, 948,183.84 and 385,272 is: 531,679.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,084.48 : 948,183.84 = 385,272 : x
  2. Step 2: Convert to fraction form
    687,084.48/948,183.84 = 385,272/x
  3. Step 3: Cross multiply
    687,084.48x = 948,183.84 × 385,272
  4. Step 4: Simplify right side
    687,084.48x = 365,308,684,404.48
  5. Step 5: Solve for x
    x = 365,308,684,404.48/687,084.48
  6. Step 6: Final answer
    x = 531,679.43

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.