Home / 2,331.78-3,217.59-1,387.32

Finding the Fourth Proportional to 2,331.78, 3,217.59 and 1,387.32

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Solution

The fourth proportional to 2,331.78, 3,217.59 and 1,387.32 is: 1,914.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,331.78 : 3,217.59 = 1,387.32 : x
  2. Step 2: Convert to fraction form
    2,331.78/3,217.59 = 1,387.32/x
  3. Step 3: Cross multiply
    2,331.78x = 3,217.59 × 1,387.32
  4. Step 4: Simplify right side
    2,331.78x = 4,463,826.96
  5. Step 5: Solve for x
    x = 4,463,826.96/2,331.78
  6. Step 6: Final answer
    x = 1,914.34

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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.