Home / 389,939.20-584,908.80-109,456.45

Finding the Fourth Proportional to 389,939.20, 584,908.80 and 109,456.45

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Solution

The fourth proportional to 389,939.20, 584,908.80 and 109,456.45 is: 164,184.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,939.20 : 584,908.80 = 109,456.45 : x
  2. Step 2: Convert to fraction form
    389,939.20/584,908.80 = 109,456.45/x
  3. Step 3: Cross multiply
    389,939.20x = 584,908.80 × 109,456.45
  4. Step 4: Simplify right side
    389,939.20x = 64,022,040,821.76
  5. Step 5: Solve for x
    x = 64,022,040,821.76/389,939.20
  6. Step 6: Final answer
    x = 164,184.68

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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.