Home / 3,985.05-5,977.65-1,520.12

Finding the Fourth Proportional to 3,985.05, 5,977.65 and 1,520.12

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Solution

The fourth proportional to 3,985.05, 5,977.65 and 1,520.12 is: 2,280.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,985.05 : 5,977.65 = 1,520.12 : x
  2. Step 2: Convert to fraction form
    3,985.05/5,977.65 = 1,520.12/x
  3. Step 3: Cross multiply
    3,985.05x = 5,977.65 × 1,520.12
  4. Step 4: Simplify right side
    3,985.05x = 9,086,723.79
  5. Step 5: Solve for x
    x = 9,086,723.79/3,985.05
  6. Step 6: Final answer
    x = 2,280.20

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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.