Home / 1,284.10-1,926.59-406.72

Finding the Fourth Proportional to 1,284.10, 1,926.59 and 406.72

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Solution

The fourth proportional to 1,284.10, 1,926.59 and 406.72 is: 610.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,284.10 : 1,926.59 = 406.72 : x
  2. Step 2: Convert to fraction form
    1,284.10/1,926.59 = 406.72/x
  3. Step 3: Cross multiply
    1,284.10x = 1,926.59 × 406.72
  4. Step 4: Simplify right side
    1,284.10x = 783,583.06
  5. Step 5: Solve for x
    x = 783,583.06/1,284.10
  6. Step 6: Final answer
    x = 610.22

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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.