Home / 661,003.20-991,310.40-261,511.20

Finding the Fourth Proportional to 661,003.20, 991,310.40 and 261,511.20

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Solution

The fourth proportional to 661,003.20, 991,310.40 and 261,511.20 is: 392,189.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,003.20 : 991,310.40 = 261,511.20 : x
  2. Step 2: Convert to fraction form
    661,003.20/991,310.40 = 261,511.20/x
  3. Step 3: Cross multiply
    661,003.20x = 991,310.40 × 261,511.20
  4. Step 4: Simplify right side
    661,003.20x = 259,238,772,276.48
  5. Step 5: Solve for x
    x = 259,238,772,276.48/661,003.20
  6. Step 6: Final answer
    x = 392,189.89

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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.