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Finding the Fourth Proportional to 260,060.10, 390,090.15 and 220,791.30

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Solution

The fourth proportional to 260,060.10, 390,090.15 and 220,791.30 is: 331,186.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,060.10 : 390,090.15 = 220,791.30 : x
  2. Step 2: Convert to fraction form
    260,060.10/390,090.15 = 220,791.30/x
  3. Step 3: Cross multiply
    260,060.10x = 390,090.15 × 220,791.30
  4. Step 4: Simplify right side
    260,060.10x = 86,128,511,335.70
  5. Step 5: Solve for x
    x = 86,128,511,335.70/260,060.10
  6. Step 6: Final answer
    x = 331,186.95

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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.