Home / 1,282.20-1,922.01-415.86

Finding the Fourth Proportional to 1,282.20, 1,922.01 and 415.86

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Solution

The fourth proportional to 1,282.20, 1,922.01 and 415.86 is: 623.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,282.20 : 1,922.01 = 415.86 : x
  2. Step 2: Convert to fraction form
    1,282.20/1,922.01 = 415.86/x
  3. Step 3: Cross multiply
    1,282.20x = 1,922.01 × 415.86
  4. Step 4: Simplify right side
    1,282.20x = 799,287.08
  5. Step 5: Solve for x
    x = 799,287.08/1,282.20
  6. Step 6: Final answer
    x = 623.37

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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.