Home / 1,720.85-2,377.55-1,199.21

Finding the Fourth Proportional to 1,720.85, 2,377.55 and 1,199.21

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Solution

The fourth proportional to 1,720.85, 2,377.55 and 1,199.21 is: 1,656.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,720.85 : 2,377.55 = 1,199.21 : x
  2. Step 2: Convert to fraction form
    1,720.85/2,377.55 = 1,199.21/x
  3. Step 3: Cross multiply
    1,720.85x = 2,377.55 × 1,199.21
  4. Step 4: Simplify right side
    1,720.85x = 2,851,172.85
  5. Step 5: Solve for x
    x = 2,851,172.85/1,720.85
  6. Step 6: Final answer
    x = 1,656.84

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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.