Home / 1,284.35-1,773.51-1,218.74

Finding the Fourth Proportional to 1,284.35, 1,773.51 and 1,218.74

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Solution

The fourth proportional to 1,284.35, 1,773.51 and 1,218.74 is: 1,682.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,284.35 : 1,773.51 = 1,218.74 : x
  2. Step 2: Convert to fraction form
    1,284.35/1,773.51 = 1,218.74/x
  3. Step 3: Cross multiply
    1,284.35x = 1,773.51 × 1,218.74
  4. Step 4: Simplify right side
    1,284.35x = 2,161,447.58
  5. Step 5: Solve for x
    x = 2,161,447.58/1,284.35
  6. Step 6: Final answer
    x = 1,682.91

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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.