Home / 3,985.13-5,977.20-1,211.69

Finding the Fourth Proportional to 3,985.13, 5,977.20 and 1,211.69

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Solution

The fourth proportional to 3,985.13, 5,977.20 and 1,211.69 is: 1,817.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,985.13 : 5,977.20 = 1,211.69 : x
  2. Step 2: Convert to fraction form
    3,985.13/5,977.20 = 1,211.69/x
  3. Step 3: Cross multiply
    3,985.13x = 5,977.20 × 1,211.69
  4. Step 4: Simplify right side
    3,985.13x = 7,242,513.47
  5. Step 5: Solve for x
    x = 7,242,513.47/3,985.13
  6. Step 6: Final answer
    x = 1,817.38

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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.