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Finding the Fourth Proportional to 280,606.20, 387,244.86 and 153,283.88

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Solution

The fourth proportional to 280,606.20, 387,244.86 and 153,283.88 is: 211,536.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,606.20 : 387,244.86 = 153,283.88 : x
  2. Step 2: Convert to fraction form
    280,606.20/387,244.86 = 153,283.88/x
  3. Step 3: Cross multiply
    280,606.20x = 387,244.86 × 153,283.88
  4. Step 4: Simplify right side
    280,606.20x = 59,358,394,650.86
  5. Step 5: Solve for x
    x = 59,358,394,650.86/280,606.20
  6. Step 6: Final answer
    x = 211,536.29

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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.