Home / 3,391.21-4,680.12-1,955.80

Finding the Fourth Proportional to 3,391.21, 4,680.12 and 1,955.80

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Solution

The fourth proportional to 3,391.21, 4,680.12 and 1,955.80 is: 2,699.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,391.21 : 4,680.12 = 1,955.80 : x
  2. Step 2: Convert to fraction form
    3,391.21/4,680.12 = 1,955.80/x
  3. Step 3: Cross multiply
    3,391.21x = 4,680.12 × 1,955.80
  4. Step 4: Simplify right side
    3,391.21x = 9,153,400.66
  5. Step 5: Solve for x
    x = 9,153,400.66/3,391.21
  6. Step 6: Final answer
    x = 2,699.16

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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.