Home / 1,284.28-1,926.72-418.60

Finding the Fourth Proportional to 1,284.28, 1,926.72 and 418.60

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Solution

The fourth proportional to 1,284.28, 1,926.72 and 418.60 is: 628.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,284.28 : 1,926.72 = 418.60 : x
  2. Step 2: Convert to fraction form
    1,284.28/1,926.72 = 418.60/x
  3. Step 3: Cross multiply
    1,284.28x = 1,926.72 × 418.60
  4. Step 4: Simplify right side
    1,284.28x = 806,524.99
  5. Step 5: Solve for x
    x = 806,524.99/1,284.28
  6. Step 6: Final answer
    x = 628.00

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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.