Home / 2,332.78-3,218.97-1,388.32

Finding the Fourth Proportional to 2,332.78, 3,218.97 and 1,388.32

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Solution

The fourth proportional to 2,332.78, 3,218.97 and 1,388.32 is: 1,915.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,332.78 : 3,218.97 = 1,388.32 : x
  2. Step 2: Convert to fraction form
    2,332.78/3,218.97 = 1,388.32/x
  3. Step 3: Cross multiply
    2,332.78x = 3,218.97 × 1,388.32
  4. Step 4: Simplify right side
    2,332.78x = 4,468,960.43
  5. Step 5: Solve for x
    x = 4,468,960.43/2,332.78
  6. Step 6: Final answer
    x = 1,915.72

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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.