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Finding the Fourth Proportional to 2,939.64, 4,379.56 and 2,800.32

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Solution

The fourth proportional to 2,939.64, 4,379.56 and 2,800.32 is: 4,172.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,939.64 : 4,379.56 = 2,800.32 : x
  2. Step 2: Convert to fraction form
    2,939.64/4,379.56 = 2,800.32/x
  3. Step 3: Cross multiply
    2,939.64x = 4,379.56 × 2,800.32
  4. Step 4: Simplify right side
    2,939.64x = 12,264,169.46
  5. Step 5: Solve for x
    x = 12,264,169.46/2,939.64
  6. Step 6: Final answer
    x = 4,172.00

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.