Home / 280,140.79-386,626.55-155,974.27

Finding the Fourth Proportional to 280,140.79, 386,626.55 and 155,974.27

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Solution

The fourth proportional to 280,140.79, 386,626.55 and 155,974.27 is: 215,262.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,140.79 : 386,626.55 = 155,974.27 : x
  2. Step 2: Convert to fraction form
    280,140.79/386,626.55 = 155,974.27/x
  3. Step 3: Cross multiply
    280,140.79x = 386,626.55 × 155,974.27
  4. Step 4: Simplify right side
    280,140.79x = 60,303,793,898.87
  5. Step 5: Solve for x
    x = 60,303,793,898.87/280,140.79
  6. Step 6: Final answer
    x = 215,262.45

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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.