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Finding the Fourth Proportional to 3,137.83, 4,707.42 and 946.78

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Solution

The fourth proportional to 3,137.83, 4,707.42 and 946.78 is: 1,420.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,137.83 : 4,707.42 = 946.78 : x
  2. Step 2: Convert to fraction form
    3,137.83/4,707.42 = 946.78/x
  3. Step 3: Cross multiply
    3,137.83x = 4,707.42 × 946.78
  4. Step 4: Simplify right side
    3,137.83x = 4,456,891.11
  5. Step 5: Solve for x
    x = 4,456,891.11/3,137.83
  6. Step 6: Final answer
    x = 1,420.37

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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.