Home / 280,109.75-386,428.32-189,432.27

Finding the Fourth Proportional to 280,109.75, 386,428.32 and 189,432.27

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Solution

The fourth proportional to 280,109.75, 386,428.32 and 189,432.27 is: 261,333.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,109.75 : 386,428.32 = 189,432.27 : x
  2. Step 2: Convert to fraction form
    280,109.75/386,428.32 = 189,432.27/x
  3. Step 3: Cross multiply
    280,109.75x = 386,428.32 × 189,432.27
  4. Step 4: Simplify right side
    280,109.75x = 73,201,993,849.89
  5. Step 5: Solve for x
    x = 73,201,993,849.89/280,109.75
  6. Step 6: Final answer
    x = 261,333.26

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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.