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Finding the Fourth Proportional to 280,400.61, 386,950.87 and 153,076.20

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Solution

The fourth proportional to 280,400.61, 386,950.87 and 153,076.20 is: 211,244.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,400.61 : 386,950.87 = 153,076.20 : x
  2. Step 2: Convert to fraction form
    280,400.61/386,950.87 = 153,076.20/x
  3. Step 3: Cross multiply
    280,400.61x = 386,950.87 × 153,076.20
  4. Step 4: Simplify right side
    280,400.61x = 59,232,967,033.54
  5. Step 5: Solve for x
    x = 59,232,967,033.54/280,400.61
  6. Step 6: Final answer
    x = 211,244.08

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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.