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Finding the Fourth Proportional to 280,889.24, 387,627.19 and 153,564.86

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Solution

The fourth proportional to 280,889.24, 387,627.19 and 153,564.86 is: 211,919.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,889.24 : 387,627.19 = 153,564.86 : x
  2. Step 2: Convert to fraction form
    280,889.24/387,627.19 = 153,564.86/x
  3. Step 3: Cross multiply
    280,889.24x = 387,627.19 × 153,564.86
  4. Step 4: Simplify right side
    280,889.24x = 59,525,915,749.70
  5. Step 5: Solve for x
    x = 59,525,915,749.70/280,889.24
  6. Step 6: Final answer
    x = 211,919.53

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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.