Home / 1,575.12-2,173.17-911.80

Finding the Fourth Proportional to 1,575.12, 2,173.17 and 911.80

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Solution

The fourth proportional to 1,575.12, 2,173.17 and 911.80 is: 1,258.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,575.12 : 2,173.17 = 911.80 : x
  2. Step 2: Convert to fraction form
    1,575.12/2,173.17 = 911.80/x
  3. Step 3: Cross multiply
    1,575.12x = 2,173.17 × 911.80
  4. Step 4: Simplify right side
    1,575.12x = 1,981,496.41
  5. Step 5: Solve for x
    x = 1,981,496.41/1,575.12
  6. Step 6: Final answer
    x = 1,258.00

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.