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Finding the Fourth Proportional to 5,348.40, 7,380.81 and 2,990.49

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Solution

The fourth proportional to 5,348.40, 7,380.81 and 2,990.49 is: 4,126.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,348.40 : 7,380.81 = 2,990.49 : x
  2. Step 2: Convert to fraction form
    5,348.40/7,380.81 = 2,990.49/x
  3. Step 3: Cross multiply
    5,348.40x = 7,380.81 × 2,990.49
  4. Step 4: Simplify right side
    5,348.40x = 22,072,238.50
  5. Step 5: Solve for x
    x = 22,072,238.50/5,348.40
  6. Step 6: Final answer
    x = 4,126.89

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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.