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Finding the Fourth Proportional to 3,755.40, 5,630.40 and 2,112.45

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Solution

The fourth proportional to 3,755.40, 5,630.40 and 2,112.45 is: 3,167.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,755.40 : 5,630.40 = 2,112.45 : x
  2. Step 2: Convert to fraction form
    3,755.40/5,630.40 = 2,112.45/x
  3. Step 3: Cross multiply
    3,755.40x = 5,630.40 × 2,112.45
  4. Step 4: Simplify right side
    3,755.40x = 11,893,938.48
  5. Step 5: Solve for x
    x = 11,893,938.48/3,755.40
  6. Step 6: Final answer
    x = 3,167.16

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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.