Home / 2,939.76-4,056.96-1,680.72

Finding the Fourth Proportional to 2,939.76, 4,056.96 and 1,680.72

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Solution

The fourth proportional to 2,939.76, 4,056.96 and 1,680.72 is: 2,319.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,939.76 : 4,056.96 = 1,680.72 : x
  2. Step 2: Convert to fraction form
    2,939.76/4,056.96 = 1,680.72/x
  3. Step 3: Cross multiply
    2,939.76x = 4,056.96 × 1,680.72
  4. Step 4: Simplify right side
    2,939.76x = 6,818,613.81
  5. Step 5: Solve for x
    x = 6,818,613.81/2,939.76
  6. Step 6: Final answer
    x = 2,319.45

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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.