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Finding the Fourth Proportional to 419,281.35, 628,728.39 and 134,918.97

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Solution

The fourth proportional to 419,281.35, 628,728.39 and 134,918.97 is: 202,316.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,281.35 : 628,728.39 = 134,918.97 : x
  2. Step 2: Convert to fraction form
    419,281.35/628,728.39 = 134,918.97/x
  3. Step 3: Cross multiply
    419,281.35x = 628,728.39 × 134,918.97
  4. Step 4: Simplify right side
    419,281.35x = 84,827,386,788.56
  5. Step 5: Solve for x
    x = 84,827,386,788.56/419,281.35
  6. Step 6: Final answer
    x = 202,316.15

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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.