Home / 3,920.10-5,880.35-1,146.71

Finding the Fourth Proportional to 3,920.10, 5,880.35 and 1,146.71

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Solution

The fourth proportional to 3,920.10, 5,880.35 and 1,146.71 is: 1,720.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,920.10 : 5,880.35 = 1,146.71 : x
  2. Step 2: Convert to fraction form
    3,920.10/5,880.35 = 1,146.71/x
  3. Step 3: Cross multiply
    3,920.10x = 5,880.35 × 1,146.71
  4. Step 4: Simplify right side
    3,920.10x = 6,743,034.19
  5. Step 5: Solve for x
    x = 6,743,034.19/3,920.10
  6. Step 6: Final answer
    x = 1,720.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.