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Finding the Fourth Proportional to 418,778.19, 628,272.81 and 134,494.29

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Solution

The fourth proportional to 418,778.19, 628,272.81 and 134,494.29 is: 201,775.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,778.19 : 628,272.81 = 134,494.29 : x
  2. Step 2: Convert to fraction form
    418,778.19/628,272.81 = 134,494.29/x
  3. Step 3: Cross multiply
    418,778.19x = 628,272.81 × 134,494.29
  4. Step 4: Simplify right side
    418,778.19x = 84,499,105,507.25
  5. Step 5: Solve for x
    x = 84,499,105,507.25/418,778.19
  6. Step 6: Final answer
    x = 201,775.33

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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.