Home / 2,018.20-3,027.30-1,985.80

Finding the Fourth Proportional to 2,018.20, 3,027.30 and 1,985.80

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Solution

The fourth proportional to 2,018.20, 3,027.30 and 1,985.80 is: 2,978.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,018.20 : 3,027.30 = 1,985.80 : x
  2. Step 2: Convert to fraction form
    2,018.20/3,027.30 = 1,985.80/x
  3. Step 3: Cross multiply
    2,018.20x = 3,027.30 × 1,985.80
  4. Step 4: Simplify right side
    2,018.20x = 6,011,612.34
  5. Step 5: Solve for x
    x = 6,011,612.34/2,018.20
  6. Step 6: Final answer
    x = 2,978.70

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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.