Home / 1,631.44-2,447.21-398.85

Finding the Fourth Proportional to 1,631.44, 2,447.21 and 398.85

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Solution

The fourth proportional to 1,631.44, 2,447.21 and 398.85 is: 598.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,631.44 : 2,447.21 = 398.85 : x
  2. Step 2: Convert to fraction form
    1,631.44/2,447.21 = 398.85/x
  3. Step 3: Cross multiply
    1,631.44x = 2,447.21 × 398.85
  4. Step 4: Simplify right side
    1,631.44x = 976,068.61
  5. Step 5: Solve for x
    x = 976,068.61/1,631.44
  6. Step 6: Final answer
    x = 598.29

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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.