Home / 1,431.37-2,149.47-938.62

Finding the Fourth Proportional to 1,431.37, 2,149.47 and 938.62

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Solution

The fourth proportional to 1,431.37, 2,149.47 and 938.62 is: 1,409.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,431.37 : 2,149.47 = 938.62 : x
  2. Step 2: Convert to fraction form
    1,431.37/2,149.47 = 938.62/x
  3. Step 3: Cross multiply
    1,431.37x = 2,149.47 × 938.62
  4. Step 4: Simplify right side
    1,431.37x = 2,017,535.53
  5. Step 5: Solve for x
    x = 2,017,535.53/1,431.37
  6. Step 6: Final answer
    x = 1,409.51

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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.