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Finding the Fourth Proportional to 255,112.80, 382,669.20 and 220,120.80

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Solution

The fourth proportional to 255,112.80, 382,669.20 and 220,120.80 is: 330,181.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,112.80 : 382,669.20 = 220,120.80 : x
  2. Step 2: Convert to fraction form
    255,112.80/382,669.20 = 220,120.80/x
  3. Step 3: Cross multiply
    255,112.80x = 382,669.20 × 220,120.80
  4. Step 4: Simplify right side
    255,112.80x = 84,233,450,439.36
  5. Step 5: Solve for x
    x = 84,233,450,439.36/255,112.80
  6. Step 6: Final answer
    x = 330,181.20

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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.