Home / 3,115.16-4,298.80-1,787.92

Finding the Fourth Proportional to 3,115.16, 4,298.80 and 1,787.92

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Solution

The fourth proportional to 3,115.16, 4,298.80 and 1,787.92 is: 2,467.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,115.16 : 4,298.80 = 1,787.92 : x
  2. Step 2: Convert to fraction form
    3,115.16/4,298.80 = 1,787.92/x
  3. Step 3: Cross multiply
    3,115.16x = 4,298.80 × 1,787.92
  4. Step 4: Simplify right side
    3,115.16x = 7,685,910.50
  5. Step 5: Solve for x
    x = 7,685,910.50/3,115.16
  6. Step 6: Final answer
    x = 2,467.26

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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.