Home / 3,988.36-5,979.98-1,908.32

Finding the Fourth Proportional to 3,988.36, 5,979.98 and 1,908.32

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Solution

The fourth proportional to 3,988.36, 5,979.98 and 1,908.32 is: 2,861.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,988.36 : 5,979.98 = 1,908.32 : x
  2. Step 2: Convert to fraction form
    3,988.36/5,979.98 = 1,908.32/x
  3. Step 3: Cross multiply
    3,988.36x = 5,979.98 × 1,908.32
  4. Step 4: Simplify right side
    3,988.36x = 11,411,696.39
  5. Step 5: Solve for x
    x = 11,411,696.39/3,988.36
  6. Step 6: Final answer
    x = 2,861.25

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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.