Home / 1,284.42-1,926.30-626.31

Finding the Fourth Proportional to 1,284.42, 1,926.30 and 626.31

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Solution

The fourth proportional to 1,284.42, 1,926.30 and 626.31 is: 939.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,284.42 : 1,926.30 = 626.31 : x
  2. Step 2: Convert to fraction form
    1,284.42/1,926.30 = 626.31/x
  3. Step 3: Cross multiply
    1,284.42x = 1,926.30 × 626.31
  4. Step 4: Simplify right side
    1,284.42x = 1,206,460.95
  5. Step 5: Solve for x
    x = 1,206,460.95/1,284.42
  6. Step 6: Final answer
    x = 939.30

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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.