Home / 2,382.90-3,288.42-1,438.74

Finding the Fourth Proportional to 2,382.90, 3,288.42 and 1,438.74

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Solution

The fourth proportional to 2,382.90, 3,288.42 and 1,438.74 is: 1,985.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,382.90 : 3,288.42 = 1,438.74 : x
  2. Step 2: Convert to fraction form
    2,382.90/3,288.42 = 1,438.74/x
  3. Step 3: Cross multiply
    2,382.90x = 3,288.42 × 1,438.74
  4. Step 4: Simplify right side
    2,382.90x = 4,731,181.39
  5. Step 5: Solve for x
    x = 4,731,181.39/2,382.90
  6. Step 6: Final answer
    x = 1,985.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.