Home / 2,939.81-4,056.67-1,680.61

Finding the Fourth Proportional to 2,939.81, 4,056.67 and 1,680.61

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Solution

The fourth proportional to 2,939.81, 4,056.67 and 1,680.61 is: 2,319.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,939.81 : 4,056.67 = 1,680.61 : x
  2. Step 2: Convert to fraction form
    2,939.81/4,056.67 = 1,680.61/x
  3. Step 3: Cross multiply
    2,939.81x = 4,056.67 × 1,680.61
  4. Step 4: Simplify right side
    2,939.81x = 6,817,680.17
  5. Step 5: Solve for x
    x = 6,817,680.17/2,939.81
  6. Step 6: Final answer
    x = 2,319.09

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.