Home / 3,920.36-5,880.72-1,288.13

Finding the Fourth Proportional to 3,920.36, 5,880.72 and 1,288.13

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Solution

The fourth proportional to 3,920.36, 5,880.72 and 1,288.13 is: 1,932.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,920.36 : 5,880.72 = 1,288.13 : x
  2. Step 2: Convert to fraction form
    3,920.36/5,880.72 = 1,288.13/x
  3. Step 3: Cross multiply
    3,920.36x = 5,880.72 × 1,288.13
  4. Step 4: Simplify right side
    3,920.36x = 7,575,102.45
  5. Step 5: Solve for x
    x = 7,575,102.45/3,920.36
  6. Step 6: Final answer
    x = 1,932.25

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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.