Home / 1,628.40-2,442.60-395.80

Finding the Fourth Proportional to 1,628.40, 2,442.60 and 395.80

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Solution

The fourth proportional to 1,628.40, 2,442.60 and 395.80 is: 593.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,628.40 : 2,442.60 = 395.80 : x
  2. Step 2: Convert to fraction form
    1,628.40/2,442.60 = 395.80/x
  3. Step 3: Cross multiply
    1,628.40x = 2,442.60 × 395.80
  4. Step 4: Simplify right side
    1,628.40x = 966,790.20
  5. Step 5: Solve for x
    x = 966,790.20/1,628.40
  6. Step 6: Final answer
    x = 593.70

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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.