Home / 1,780.38-2,458.22-1,284.12

Finding the Fourth Proportional to 1,780.38, 2,458.22 and 1,284.12

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Solution

The fourth proportional to 1,780.38, 2,458.22 and 1,284.12 is: 1,773.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,780.38 : 2,458.22 = 1,284.12 : x
  2. Step 2: Convert to fraction form
    1,780.38/2,458.22 = 1,284.12/x
  3. Step 3: Cross multiply
    1,780.38x = 2,458.22 × 1,284.12
  4. Step 4: Simplify right side
    1,780.38x = 3,156,643.05
  5. Step 5: Solve for x
    x = 3,156,643.05/1,780.38
  6. Step 6: Final answer
    x = 1,773.02

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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.