Home / 2,938.78-4,056.38-1,680.55

Finding the Fourth Proportional to 2,938.78, 4,056.38 and 1,680.55

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Solution

The fourth proportional to 2,938.78, 4,056.38 and 1,680.55 is: 2,319.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,938.78 : 4,056.38 = 1,680.55 : x
  2. Step 2: Convert to fraction form
    2,938.78/4,056.38 = 1,680.55/x
  3. Step 3: Cross multiply
    2,938.78x = 4,056.38 × 1,680.55
  4. Step 4: Simplify right side
    2,938.78x = 6,816,937.17
  5. Step 5: Solve for x
    x = 6,816,937.17/2,938.78
  6. Step 6: Final answer
    x = 2,319.65

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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.