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Finding the Fourth Proportional to 3,171.96, 4,752.90 and 1,690.78

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Solution

The fourth proportional to 3,171.96, 4,752.90 and 1,690.78 is: 2,533.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,171.96 : 4,752.90 = 1,690.78 : x
  2. Step 2: Convert to fraction form
    3,171.96/4,752.90 = 1,690.78/x
  3. Step 3: Cross multiply
    3,171.96x = 4,752.90 × 1,690.78
  4. Step 4: Simplify right side
    3,171.96x = 8,036,108.26
  5. Step 5: Solve for x
    x = 8,036,108.26/3,171.96
  6. Step 6: Final answer
    x = 2,533.48

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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.