Home / 3,178.49-4,386.71-1,999.54

Finding the Fourth Proportional to 3,178.49, 4,386.71 and 1,999.54

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Solution

The fourth proportional to 3,178.49, 4,386.71 and 1,999.54 is: 2,759.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,178.49 : 4,386.71 = 1,999.54 : x
  2. Step 2: Convert to fraction form
    3,178.49/4,386.71 = 1,999.54/x
  3. Step 3: Cross multiply
    3,178.49x = 4,386.71 × 1,999.54
  4. Step 4: Simplify right side
    3,178.49x = 8,771,370.18
  5. Step 5: Solve for x
    x = 8,771,370.18/3,178.49
  6. Step 6: Final answer
    x = 2,759.60

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1.5x scale

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.