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Finding the Fourth Proportional to 3,369.35, 5,047.07 and 1,978.49

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Solution

The fourth proportional to 3,369.35, 5,047.07 and 1,978.49 is: 2,963.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,369.35 : 5,047.07 = 1,978.49 : x
  2. Step 2: Convert to fraction form
    3,369.35/5,047.07 = 1,978.49/x
  3. Step 3: Cross multiply
    3,369.35x = 5,047.07 × 1,978.49
  4. Step 4: Simplify right side
    3,369.35x = 9,985,542.40
  5. Step 5: Solve for x
    x = 9,985,542.40/3,369.35
  6. Step 6: Final answer
    x = 2,963.64

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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.