Home / 2,938.74-4,055.58-1,680

Finding the Fourth Proportional to 2,938.74, 4,055.58 and 1,680

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Solution

The fourth proportional to 2,938.74, 4,055.58 and 1,680 is: 2,318.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,938.74 : 4,055.58 = 1,680 : x
  2. Step 2: Convert to fraction form
    2,938.74/4,055.58 = 1,680/x
  3. Step 3: Cross multiply
    2,938.74x = 4,055.58 × 1,680
  4. Step 4: Simplify right side
    2,938.74x = 6,813,374.40
  5. Step 5: Solve for x
    x = 6,813,374.40/2,938.74
  6. Step 6: Final answer
    x = 2,318.47

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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.