Home / 3,880.32-5,815.44-1,686.12

Finding the Fourth Proportional to 3,880.32, 5,815.44 and 1,686.12

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Solution

The fourth proportional to 3,880.32, 5,815.44 and 1,686.12 is: 2,526.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,880.32 : 5,815.44 = 1,686.12 : x
  2. Step 2: Convert to fraction form
    3,880.32/5,815.44 = 1,686.12/x
  3. Step 3: Cross multiply
    3,880.32x = 5,815.44 × 1,686.12
  4. Step 4: Simplify right side
    3,880.32x = 9,805,529.69
  5. Step 5: Solve for x
    x = 9,805,529.69/3,880.32
  6. Step 6: Final answer
    x = 2,526.99

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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.