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Finding the Fourth Proportional to 275,511.10, 380,243.70 and 153,031

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Solution

The fourth proportional to 275,511.10, 380,243.70 and 153,031 is: 211,204.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,511.10 : 380,243.70 = 153,031 : x
  2. Step 2: Convert to fraction form
    275,511.10/380,243.70 = 153,031/x
  3. Step 3: Cross multiply
    275,511.10x = 380,243.70 × 153,031
  4. Step 4: Simplify right side
    275,511.10x = 58,189,073,654.70
  5. Step 5: Solve for x
    x = 58,189,073,654.70/275,511.10
  6. Step 6: Final answer
    x = 211,204.10

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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.