Home / 1,645.20-2,467.80-490.95

Finding the Fourth Proportional to 1,645.20, 2,467.80 and 490.95

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Solution

The fourth proportional to 1,645.20, 2,467.80 and 490.95 is: 736.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,645.20 : 2,467.80 = 490.95 : x
  2. Step 2: Convert to fraction form
    1,645.20/2,467.80 = 490.95/x
  3. Step 3: Cross multiply
    1,645.20x = 2,467.80 × 490.95
  4. Step 4: Simplify right side
    1,645.20x = 1,211,566.41
  5. Step 5: Solve for x
    x = 1,211,566.41/1,645.20
  6. Step 6: Final answer
    x = 736.43

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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.