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Finding the Fourth Proportional to 275,130.90, 412,005.15 and 219,834.90

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Solution

The fourth proportional to 275,130.90, 412,005.15 and 219,834.90 is: 329,200.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,130.90 : 412,005.15 = 219,834.90 : x
  2. Step 2: Convert to fraction form
    275,130.90/412,005.15 = 219,834.90/x
  3. Step 3: Cross multiply
    275,130.90x = 412,005.15 × 219,834.90
  4. Step 4: Simplify right side
    275,130.90x = 90,573,110,949.74
  5. Step 5: Solve for x
    x = 90,573,110,949.74/275,130.90
  6. Step 6: Final answer
    x = 329,200.07

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1.5x scale

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.