Home / 1,284.51-1,926.72-418.82

Finding the Fourth Proportional to 1,284.51, 1,926.72 and 418.82

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Solution

The fourth proportional to 1,284.51, 1,926.72 and 418.82 is: 628.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,284.51 : 1,926.72 = 418.82 : x
  2. Step 2: Convert to fraction form
    1,284.51/1,926.72 = 418.82/x
  3. Step 3: Cross multiply
    1,284.51x = 1,926.72 × 418.82
  4. Step 4: Simplify right side
    1,284.51x = 806,948.87
  5. Step 5: Solve for x
    x = 806,948.87/1,284.51
  6. Step 6: Final answer
    x = 628.22

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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.