Home / 1,948.20-2,689.62-1,284.80

Finding the Fourth Proportional to 1,948.20, 2,689.62 and 1,284.80

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Solution

The fourth proportional to 1,948.20, 2,689.62 and 1,284.80 is: 1,773.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,948.20 : 2,689.62 = 1,284.80 : x
  2. Step 2: Convert to fraction form
    1,948.20/2,689.62 = 1,284.80/x
  3. Step 3: Cross multiply
    1,948.20x = 2,689.62 × 1,284.80
  4. Step 4: Simplify right side
    1,948.20x = 3,455,623.78
  5. Step 5: Solve for x
    x = 3,455,623.78/1,948.20
  6. Step 6: Final answer
    x = 1,773.75

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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.