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Finding the Fourth Proportional to 280,563.60, 387,177.77 and 153,239.50

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Solution

The fourth proportional to 280,563.60, 387,177.77 and 153,239.50 is: 211,470.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,563.60 : 387,177.77 = 153,239.50 : x
  2. Step 2: Convert to fraction form
    280,563.60/387,177.77 = 153,239.50/x
  3. Step 3: Cross multiply
    280,563.60x = 387,177.77 × 153,239.50
  4. Step 4: Simplify right side
    280,563.60x = 59,330,925,183.83
  5. Step 5: Solve for x
    x = 59,330,925,183.83/280,563.60
  6. Step 6: Final answer
    x = 211,470.50

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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.