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Finding the Fourth Proportional to 418,877.70, 628,316.55 and 324,399.30

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Solution

The fourth proportional to 418,877.70, 628,316.55 and 324,399.30 is: 486,598.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,877.70 : 628,316.55 = 324,399.30 : x
  2. Step 2: Convert to fraction form
    418,877.70/628,316.55 = 324,399.30/x
  3. Step 3: Cross multiply
    418,877.70x = 628,316.55 × 324,399.30
  4. Step 4: Simplify right side
    418,877.70x = 203,825,448,998.42
  5. Step 5: Solve for x
    x = 203,825,448,998.42/418,877.70
  6. Step 6: Final answer
    x = 486,598.95

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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.