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Finding the Fourth Proportional to 418,744.70, 628,117.05 and 399,499.10

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Solution

The fourth proportional to 418,744.70, 628,117.05 and 399,499.10 is: 599,248.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,744.70 : 628,117.05 = 399,499.10 : x
  2. Step 2: Convert to fraction form
    418,744.70/628,117.05 = 399,499.10/x
  3. Step 3: Cross multiply
    418,744.70x = 628,117.05 × 399,499.10
  4. Step 4: Simplify right side
    418,744.70x = 250,932,196,169.66
  5. Step 5: Solve for x
    x = 250,932,196,169.66/418,744.70
  6. Step 6: Final answer
    x = 599,248.65

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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.