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Finding the Fourth Proportional to 418,765.72, 628,127.79 and 134,470.19

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Solution

The fourth proportional to 418,765.72, 628,127.79 and 134,470.19 is: 201,698.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,765.72 : 628,127.79 = 134,470.19 : x
  2. Step 2: Convert to fraction form
    418,765.72/628,127.79 = 134,470.19/x
  3. Step 3: Cross multiply
    418,765.72x = 628,127.79 × 134,470.19
  4. Step 4: Simplify right side
    418,765.72x = 84,464,462,984.68
  5. Step 5: Solve for x
    x = 84,464,462,984.68/418,765.72
  6. Step 6: Final answer
    x = 201,698.61

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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.