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Finding the Fourth Proportional to 398,704.77, 550,202.59 and 217,420.19

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Solution

The fourth proportional to 398,704.77, 550,202.59 and 217,420.19 is: 300,034.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,704.77 : 550,202.59 = 217,420.19 : x
  2. Step 2: Convert to fraction form
    398,704.77/550,202.59 = 217,420.19/x
  3. Step 3: Cross multiply
    398,704.77x = 550,202.59 × 217,420.19
  4. Step 4: Simplify right side
    398,704.77x = 119,625,151,656.29
  5. Step 5: Solve for x
    x = 119,625,151,656.29/398,704.77
  6. Step 6: Final answer
    x = 300,034.41

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.