Home / 1,631.45-2,447.16-398.87

Finding the Fourth Proportional to 1,631.45, 2,447.16 and 398.87

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Solution

The fourth proportional to 1,631.45, 2,447.16 and 398.87 is: 598.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,631.45 : 2,447.16 = 398.87 : x
  2. Step 2: Convert to fraction form
    1,631.45/2,447.16 = 398.87/x
  3. Step 3: Cross multiply
    1,631.45x = 2,447.16 × 398.87
  4. Step 4: Simplify right side
    1,631.45x = 976,086.47
  5. Step 5: Solve for x
    x = 976,086.47/1,631.45
  6. Step 6: Final answer
    x = 598.30

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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.