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Finding the Fourth Proportional to 252,879.90, 379,429.20 and 128,220.90

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Solution

The fourth proportional to 252,879.90, 379,429.20 and 128,220.90 is: 192,386.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    252,879.90 : 379,429.20 = 128,220.90 : x
  2. Step 2: Convert to fraction form
    252,879.90/379,429.20 = 128,220.90/x
  3. Step 3: Cross multiply
    252,879.90x = 379,429.20 × 128,220.90
  4. Step 4: Simplify right side
    252,879.90x = 48,650,753,510.28
  5. Step 5: Solve for x
    x = 48,650,753,510.28/252,879.90
  6. Step 6: Final answer
    x = 192,386.80

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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.