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Finding the Fourth Proportional to 3,140.96, 4,712.16 and 949.64

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Solution

The fourth proportional to 3,140.96, 4,712.16 and 949.64 is: 1,424.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,140.96 : 4,712.16 = 949.64 : x
  2. Step 2: Convert to fraction form
    3,140.96/4,712.16 = 949.64/x
  3. Step 3: Cross multiply
    3,140.96x = 4,712.16 × 949.64
  4. Step 4: Simplify right side
    3,140.96x = 4,474,855.62
  5. Step 5: Solve for x
    x = 4,474,855.62/3,140.96
  6. Step 6: Final answer
    x = 1,424.68

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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.