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Finding the Fourth Proportional to 220,012.20, 330,018.30 and 141,280.20

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Solution

The fourth proportional to 220,012.20, 330,018.30 and 141,280.20 is: 211,920.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,012.20 : 330,018.30 = 141,280.20 : x
  2. Step 2: Convert to fraction form
    220,012.20/330,018.30 = 141,280.20/x
  3. Step 3: Cross multiply
    220,012.20x = 330,018.30 × 141,280.20
  4. Step 4: Simplify right side
    220,012.20x = 46,625,051,427.66
  5. Step 5: Solve for x
    x = 46,625,051,427.66/220,012.20
  6. Step 6: Final answer
    x = 211,920.30

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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.