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Finding the Fourth Proportional to 275,558.10, 412,943.55 and 156,978.90

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Solution

The fourth proportional to 275,558.10, 412,943.55 and 156,978.90 is: 235,244.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,558.10 : 412,943.55 = 156,978.90 : x
  2. Step 2: Convert to fraction form
    275,558.10/412,943.55 = 156,978.90/x
  3. Step 3: Cross multiply
    275,558.10x = 412,943.55 × 156,978.90
  4. Step 4: Simplify right side
    275,558.10x = 64,823,424,241.10
  5. Step 5: Solve for x
    x = 64,823,424,241.10/275,558.10
  6. Step 6: Final answer
    x = 235,244.13

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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.