Home / 1,631.20-2,446.75-398.62

Finding the Fourth Proportional to 1,631.20, 2,446.75 and 398.62

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Solution

The fourth proportional to 1,631.20, 2,446.75 and 398.62 is: 597.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,631.20 : 2,446.75 = 398.62 : x
  2. Step 2: Convert to fraction form
    1,631.20/2,446.75 = 398.62/x
  3. Step 3: Cross multiply
    1,631.20x = 2,446.75 × 398.62
  4. Step 4: Simplify right side
    1,631.20x = 975,309.26
  5. Step 5: Solve for x
    x = 975,309.26/1,631.20
  6. Step 6: Final answer
    x = 597.91

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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.