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Finding the Fourth Proportional to 3,169.49, 4,753.43 and 947.80

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Solution

The fourth proportional to 3,169.49, 4,753.43 and 947.80 is: 1,421.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,169.49 : 4,753.43 = 947.80 : x
  2. Step 2: Convert to fraction form
    3,169.49/4,753.43 = 947.80/x
  3. Step 3: Cross multiply
    3,169.49x = 4,753.43 × 947.80
  4. Step 4: Simplify right side
    3,169.49x = 4,505,284.33
  5. Step 5: Solve for x
    x = 4,505,284.33/3,169.49
  6. Step 6: Final answer
    x = 1,421.45

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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.