Home / 1,446.12-2,169.20-420.12

Finding the Fourth Proportional to 1,446.12, 2,169.20 and 420.12

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Solution

The fourth proportional to 1,446.12, 2,169.20 and 420.12 is: 630.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,446.12 : 2,169.20 = 420.12 : x
  2. Step 2: Convert to fraction form
    1,446.12/2,169.20 = 420.12/x
  3. Step 3: Cross multiply
    1,446.12x = 2,169.20 × 420.12
  4. Step 4: Simplify right side
    1,446.12x = 911,324.30
  5. Step 5: Solve for x
    x = 911,324.30/1,446.12
  6. Step 6: Final answer
    x = 630.19

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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.