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Finding the Fourth Proportional to 3,137.71, 4,705.64 and 945.85

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Solution

The fourth proportional to 3,137.71, 4,705.64 and 945.85 is: 1,418.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,137.71 : 4,705.64 = 945.85 : x
  2. Step 2: Convert to fraction form
    3,137.71/4,705.64 = 945.85/x
  3. Step 3: Cross multiply
    3,137.71x = 4,705.64 × 945.85
  4. Step 4: Simplify right side
    3,137.71x = 4,450,808.43
  5. Step 5: Solve for x
    x = 4,450,808.43/3,137.71
  6. Step 6: Final answer
    x = 1,418.49

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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.