Home / 1,245.90-1,869.12-424.26

Finding the Fourth Proportional to 1,245.90, 1,869.12 and 424.26

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Solution

The fourth proportional to 1,245.90, 1,869.12 and 424.26 is: 636.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,245.90 : 1,869.12 = 424.26 : x
  2. Step 2: Convert to fraction form
    1,245.90/1,869.12 = 424.26/x
  3. Step 3: Cross multiply
    1,245.90x = 1,869.12 × 424.26
  4. Step 4: Simplify right side
    1,245.90x = 792,992.85
  5. Step 5: Solve for x
    x = 792,992.85/1,245.90
  6. Step 6: Final answer
    x = 636.48

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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.