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Finding the Fourth Proportional to 275,711.40, 412,875.90 and 220,415.40

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Solution

The fourth proportional to 275,711.40, 412,875.90 and 220,415.40 is: 330,070.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,711.40 : 412,875.90 = 220,415.40 : x
  2. Step 2: Convert to fraction form
    275,711.40/412,875.90 = 220,415.40/x
  3. Step 3: Cross multiply
    275,711.40x = 412,875.90 × 220,415.40
  4. Step 4: Simplify right side
    275,711.40x = 91,004,206,648.86
  5. Step 5: Solve for x
    x = 91,004,206,648.86/275,711.40
  6. Step 6: Final answer
    x = 330,070.53

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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.