Home / 278,640.05-384,640.97-188,118.62

Finding the Fourth Proportional to 278,640.05, 384,640.97 and 188,118.62

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Solution

The fourth proportional to 278,640.05, 384,640.97 and 188,118.62 is: 259,683.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,640.05 : 384,640.97 = 188,118.62 : x
  2. Step 2: Convert to fraction form
    278,640.05/384,640.97 = 188,118.62/x
  3. Step 3: Cross multiply
    278,640.05x = 384,640.97 × 188,118.62
  4. Step 4: Simplify right side
    278,640.05x = 72,358,128,471.86
  5. Step 5: Solve for x
    x = 72,358,128,471.86/278,640.05
  6. Step 6: Final answer
    x = 259,683.16

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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.