Home / 1,447.50-2,171.75-717.60

Finding the Fourth Proportional to 1,447.50, 2,171.75 and 717.60

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Solution

The fourth proportional to 1,447.50, 2,171.75 and 717.60 is: 1,076.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,447.50 : 2,171.75 = 717.60 : x
  2. Step 2: Convert to fraction form
    1,447.50/2,171.75 = 717.60/x
  3. Step 3: Cross multiply
    1,447.50x = 2,171.75 × 717.60
  4. Step 4: Simplify right side
    1,447.50x = 1,558,444.21
  5. Step 5: Solve for x
    x = 1,558,444.21/1,447.50
  6. Step 6: Final answer
    x = 1,076.65

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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.