Home / 3,387.05-5,080.58-921.89

Finding the Fourth Proportional to 3,387.05, 5,080.58 and 921.89

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Solution

The fourth proportional to 3,387.05, 5,080.58 and 921.89 is: 1,382.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,387.05 : 5,080.58 = 921.89 : x
  2. Step 2: Convert to fraction form
    3,387.05/5,080.58 = 921.89/x
  3. Step 3: Cross multiply
    3,387.05x = 5,080.58 × 921.89
  4. Step 4: Simplify right side
    3,387.05x = 4,683,709.34
  5. Step 5: Solve for x
    x = 4,683,709.34/3,387.05
  6. Step 6: Final answer
    x = 1,382.83

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1.5x scale

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.