Home / 1,220.20-1,825.80-896.20

Finding the Fourth Proportional to 1,220.20, 1,825.80 and 896.20

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Solution

The fourth proportional to 1,220.20, 1,825.80 and 896.20 is: 1,340.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,220.20 : 1,825.80 = 896.20 : x
  2. Step 2: Convert to fraction form
    1,220.20/1,825.80 = 896.20/x
  3. Step 3: Cross multiply
    1,220.20x = 1,825.80 × 896.20
  4. Step 4: Simplify right side
    1,220.20x = 1,636,281.96
  5. Step 5: Solve for x
    x = 1,636,281.96/1,220.20
  6. Step 6: Final answer
    x = 1,340.99

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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.