Home / 1,288.70-1,928.49-801.98

Finding the Fourth Proportional to 1,288.70, 1,928.49 and 801.98

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Solution

The fourth proportional to 1,288.70, 1,928.49 and 801.98 is: 1,200.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,288.70 : 1,928.49 = 801.98 : x
  2. Step 2: Convert to fraction form
    1,288.70/1,928.49 = 801.98/x
  3. Step 3: Cross multiply
    1,288.70x = 1,928.49 × 801.98
  4. Step 4: Simplify right side
    1,288.70x = 1,546,610.41
  5. Step 5: Solve for x
    x = 1,546,610.41/1,288.70
  6. Step 6: Final answer
    x = 1,200.13

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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.