Home / 280,691.21-387,353.54-151,629.66

Finding the Fourth Proportional to 280,691.21, 387,353.54 and 151,629.66

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Solution

The fourth proportional to 280,691.21, 387,353.54 and 151,629.66 is: 209,248.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,691.21 : 387,353.54 = 151,629.66 : x
  2. Step 2: Convert to fraction form
    280,691.21/387,353.54 = 151,629.66/x
  3. Step 3: Cross multiply
    280,691.21x = 387,353.54 × 151,629.66
  4. Step 4: Simplify right side
    280,691.21x = 58,734,285,949.07
  5. Step 5: Solve for x
    x = 58,734,285,949.07/280,691.21
  6. Step 6: Final answer
    x = 209,248.75

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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.