Home / 3,985.14-5,977.89-1,388.28

Finding the Fourth Proportional to 3,985.14, 5,977.89 and 1,388.28

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Solution

The fourth proportional to 3,985.14, 5,977.89 and 1,388.28 is: 2,082.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,985.14 : 5,977.89 = 1,388.28 : x
  2. Step 2: Convert to fraction form
    3,985.14/5,977.89 = 1,388.28/x
  3. Step 3: Cross multiply
    3,985.14x = 5,977.89 × 1,388.28
  4. Step 4: Simplify right side
    3,985.14x = 8,298,985.13
  5. Step 5: Solve for x
    x = 8,298,985.13/3,985.14
  6. Step 6: Final answer
    x = 2,082.48

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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.