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Finding the Fourth Proportional to 3,640.90, 5,455.95 and 3,090.10

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Solution

The fourth proportional to 3,640.90, 5,455.95 and 3,090.10 is: 4,630.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,640.90 : 5,455.95 = 3,090.10 : x
  2. Step 2: Convert to fraction form
    3,640.90/5,455.95 = 3,090.10/x
  3. Step 3: Cross multiply
    3,640.90x = 5,455.95 × 3,090.10
  4. Step 4: Simplify right side
    3,640.90x = 16,859,431.10
  5. Step 5: Solve for x
    x = 16,859,431.10/3,640.90
  6. Step 6: Final answer
    x = 4,630.57

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1.5x scale

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.