Home / 2,090.60-3,135.90-1,985.30

Finding the Fourth Proportional to 2,090.60, 3,135.90 and 1,985.30

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Solution

The fourth proportional to 2,090.60, 3,135.90 and 1,985.30 is: 2,977.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,090.60 : 3,135.90 = 1,985.30 : x
  2. Step 2: Convert to fraction form
    2,090.60/3,135.90 = 1,985.30/x
  3. Step 3: Cross multiply
    2,090.60x = 3,135.90 × 1,985.30
  4. Step 4: Simplify right side
    2,090.60x = 6,225,702.27
  5. Step 5: Solve for x
    x = 6,225,702.27/2,090.60
  6. Step 6: Final answer
    x = 2,977.95

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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.