Home / 1,631.40-2,447.13-398.82

Finding the Fourth Proportional to 1,631.40, 2,447.13 and 398.82

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Solution

The fourth proportional to 1,631.40, 2,447.13 and 398.82 is: 598.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,631.40 : 2,447.13 = 398.82 : x
  2. Step 2: Convert to fraction form
    1,631.40/2,447.13 = 398.82/x
  3. Step 3: Cross multiply
    1,631.40x = 2,447.13 × 398.82
  4. Step 4: Simplify right side
    1,631.40x = 975,952.15
  5. Step 5: Solve for x
    x = 975,952.15/1,631.40
  6. Step 6: Final answer
    x = 598.23

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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.