Home / 3,115.80-4,675.32-1,384.56

Finding the Fourth Proportional to 3,115.80, 4,675.32 and 1,384.56

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Solution

The fourth proportional to 3,115.80, 4,675.32 and 1,384.56 is: 2,077.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,115.80 : 4,675.32 = 1,384.56 : x
  2. Step 2: Convert to fraction form
    3,115.80/4,675.32 = 1,384.56/x
  3. Step 3: Cross multiply
    3,115.80x = 4,675.32 × 1,384.56
  4. Step 4: Simplify right side
    3,115.80x = 6,473,261.06
  5. Step 5: Solve for x
    x = 6,473,261.06/3,115.80
  6. Step 6: Final answer
    x = 2,077.56

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.