Home / 2,578.32-3,558.08-1,399.39

Finding the Fourth Proportional to 2,578.32, 3,558.08 and 1,399.39

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Solution

The fourth proportional to 2,578.32, 3,558.08 and 1,399.39 is: 1,931.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,578.32 : 3,558.08 = 1,399.39 : x
  2. Step 2: Convert to fraction form
    2,578.32/3,558.08 = 1,399.39/x
  3. Step 3: Cross multiply
    2,578.32x = 3,558.08 × 1,399.39
  4. Step 4: Simplify right side
    2,578.32x = 4,979,116.78
  5. Step 5: Solve for x
    x = 4,979,116.78/2,578.32
  6. Step 6: Final answer
    x = 1,931.15

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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.