Home / 280,138.79-386,623.79-155,972.27

Finding the Fourth Proportional to 280,138.79, 386,623.79 and 155,972.27

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Solution

The fourth proportional to 280,138.79, 386,623.79 and 155,972.27 is: 215,259.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,138.79 : 386,623.79 = 155,972.27 : x
  2. Step 2: Convert to fraction form
    280,138.79/386,623.79 = 155,972.27/x
  3. Step 3: Cross multiply
    280,138.79x = 386,623.79 × 155,972.27
  4. Step 4: Simplify right side
    280,138.79x = 60,302,587,449.32
  5. Step 5: Solve for x
    x = 60,302,587,449.32/280,138.79
  6. Step 6: Final answer
    x = 215,259.69

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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.