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Finding the Fourth Proportional to 2,939.76, 4,410.72 and 1,640.88

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Solution

The fourth proportional to 2,939.76, 4,410.72 and 1,640.88 is: 2,461.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,939.76 : 4,410.72 = 1,640.88 : x
  2. Step 2: Convert to fraction form
    2,939.76/4,410.72 = 1,640.88/x
  3. Step 3: Cross multiply
    2,939.76x = 4,410.72 × 1,640.88
  4. Step 4: Simplify right side
    2,939.76x = 7,237,462.23
  5. Step 5: Solve for x
    x = 7,237,462.23/2,939.76
  6. Step 6: Final answer
    x = 2,461.92

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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.