Home / 1,284.24-1,926.40-669.18

Finding the Fourth Proportional to 1,284.24, 1,926.40 and 669.18

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Solution

The fourth proportional to 1,284.24, 1,926.40 and 669.18 is: 1,003.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,284.24 : 1,926.40 = 669.18 : x
  2. Step 2: Convert to fraction form
    1,284.24/1,926.40 = 669.18/x
  3. Step 3: Cross multiply
    1,284.24x = 1,926.40 × 669.18
  4. Step 4: Simplify right side
    1,284.24x = 1,289,108.35
  5. Step 5: Solve for x
    x = 1,289,108.35/1,284.24
  6. Step 6: Final answer
    x = 1,003.79

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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.