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Finding the Fourth Proportional to 478,918.50, 718,169.54 and 137,286.69

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Solution

The fourth proportional to 478,918.50, 718,169.54 and 137,286.69 is: 205,870.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,918.50 : 718,169.54 = 137,286.69 : x
  2. Step 2: Convert to fraction form
    478,918.50/718,169.54 = 137,286.69/x
  3. Step 3: Cross multiply
    478,918.50x = 718,169.54 × 137,286.69
  4. Step 4: Simplify right side
    478,918.50x = 98,595,115,414.57
  5. Step 5: Solve for x
    x = 98,595,115,414.57/478,918.50
  6. Step 6: Final answer
    x = 205,870.34

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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.