Home / 280,135.80-386,619.63-155,969.28

Finding the Fourth Proportional to 280,135.80, 386,619.63 and 155,969.28

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Solution

The fourth proportional to 280,135.80, 386,619.63 and 155,969.28 is: 215,255.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,135.80 : 386,619.63 = 155,969.28 : x
  2. Step 2: Convert to fraction form
    280,135.80/386,619.63 = 155,969.28/x
  3. Step 3: Cross multiply
    280,135.80x = 386,619.63 × 155,969.28
  4. Step 4: Simplify right side
    280,135.80x = 60,300,785,324.97
  5. Step 5: Solve for x
    x = 60,300,785,324.97/280,135.80
  6. Step 6: Final answer
    x = 215,255.55

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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.