Home / 1,284.50-1,928.14-636.61

Finding the Fourth Proportional to 1,284.50, 1,928.14 and 636.61

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Solution

The fourth proportional to 1,284.50, 1,928.14 and 636.61 is: 955.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,284.50 : 1,928.14 = 636.61 : x
  2. Step 2: Convert to fraction form
    1,284.50/1,928.14 = 636.61/x
  3. Step 3: Cross multiply
    1,284.50x = 1,928.14 × 636.61
  4. Step 4: Simplify right side
    1,284.50x = 1,227,463.56
  5. Step 5: Solve for x
    x = 1,227,463.56/1,284.50
  6. Step 6: Final answer
    x = 955.60

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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.