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Finding the Fourth Proportional to 4,090.40, 5,636.40 and 3,384.80

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Solution

The fourth proportional to 4,090.40, 5,636.40 and 3,384.80 is: 4,664.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,090.40 : 5,636.40 = 3,384.80 : x
  2. Step 2: Convert to fraction form
    4,090.40/5,636.40 = 3,384.80/x
  3. Step 3: Cross multiply
    4,090.40x = 5,636.40 × 3,384.80
  4. Step 4: Simplify right side
    4,090.40x = 19,078,086.72
  5. Step 5: Solve for x
    x = 19,078,086.72/4,090.40
  6. Step 6: Final answer
    x = 4,664.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.