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Finding the Fourth Proportional to 418,743.70, 628,115.55 and 399,498.10

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Solution

The fourth proportional to 418,743.70, 628,115.55 and 399,498.10 is: 599,247.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,743.70 : 628,115.55 = 399,498.10 : x
  2. Step 2: Convert to fraction form
    418,743.70/628,115.55 = 399,498.10/x
  3. Step 3: Cross multiply
    418,743.70x = 628,115.55 × 399,498.10
  4. Step 4: Simplify right side
    418,743.70x = 250,930,968,805.46
  5. Step 5: Solve for x
    x = 250,930,968,805.46/418,743.70
  6. Step 6: Final answer
    x = 599,247.15

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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.