Home / 3,137.34-4,329.28-1,720.80

Finding the Fourth Proportional to 3,137.34, 4,329.28 and 1,720.80

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Solution

The fourth proportional to 3,137.34, 4,329.28 and 1,720.80 is: 2,374.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,137.34 : 4,329.28 = 1,720.80 : x
  2. Step 2: Convert to fraction form
    3,137.34/4,329.28 = 1,720.80/x
  3. Step 3: Cross multiply
    3,137.34x = 4,329.28 × 1,720.80
  4. Step 4: Simplify right side
    3,137.34x = 7,449,825.02
  5. Step 5: Solve for x
    x = 7,449,825.02/3,137.34
  6. Step 6: Final answer
    x = 2,374.57

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1.5x scale

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.