Home / 1,985.21-2,977.20-1,372.85

Finding the Fourth Proportional to 1,985.21, 2,977.20 and 1,372.85

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Solution

The fourth proportional to 1,985.21, 2,977.20 and 1,372.85 is: 2,058.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,985.21 : 2,977.20 = 1,372.85 : x
  2. Step 2: Convert to fraction form
    1,985.21/2,977.20 = 1,372.85/x
  3. Step 3: Cross multiply
    1,985.21x = 2,977.20 × 1,372.85
  4. Step 4: Simplify right side
    1,985.21x = 4,087,234.13
  5. Step 5: Solve for x
    x = 4,087,234.13/1,985.21
  6. Step 6: Final answer
    x = 2,058.85

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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.