Home / 1,639.70-2,442.29-1,605.53

Finding the Fourth Proportional to 1,639.70, 2,442.29 and 1,605.53

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Solution

The fourth proportional to 1,639.70, 2,442.29 and 1,605.53 is: 2,391.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,639.70 : 2,442.29 = 1,605.53 : x
  2. Step 2: Convert to fraction form
    1,639.70/2,442.29 = 1,605.53/x
  3. Step 3: Cross multiply
    1,639.70x = 2,442.29 × 1,605.53
  4. Step 4: Simplify right side
    1,639.70x = 3,921,149.62
  5. Step 5: Solve for x
    x = 3,921,149.62/1,639.70
  6. Step 6: Final answer
    x = 2,391.38

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.