Home / 1,729.85-2,388.65-1,172.17

Finding the Fourth Proportional to 1,729.85, 2,388.65 and 1,172.17

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Solution

The fourth proportional to 1,729.85, 2,388.65 and 1,172.17 is: 1,618.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,729.85 : 2,388.65 = 1,172.17 : x
  2. Step 2: Convert to fraction form
    1,729.85/2,388.65 = 1,172.17/x
  3. Step 3: Cross multiply
    1,729.85x = 2,388.65 × 1,172.17
  4. Step 4: Simplify right side
    1,729.85x = 2,799,903.87
  5. Step 5: Solve for x
    x = 2,799,903.87/1,729.85
  6. Step 6: Final answer
    x = 1,618.58

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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.