Home / 3,178.29-4,385.56-1,815.45

Finding the Fourth Proportional to 3,178.29, 4,385.56 and 1,815.45

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Solution

The fourth proportional to 3,178.29, 4,385.56 and 1,815.45 is: 2,505.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,178.29 : 4,385.56 = 1,815.45 : x
  2. Step 2: Convert to fraction form
    3,178.29/4,385.56 = 1,815.45/x
  3. Step 3: Cross multiply
    3,178.29x = 4,385.56 × 1,815.45
  4. Step 4: Simplify right side
    3,178.29x = 7,961,787.02
  5. Step 5: Solve for x
    x = 7,961,787.02/3,178.29
  6. Step 6: Final answer
    x = 2,505.06

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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.