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Finding the Fourth Proportional to 280,342.98, 386,873.19 and 153,018.63

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Solution

The fourth proportional to 280,342.98, 386,873.19 and 153,018.63 is: 211,165.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,342.98 : 386,873.19 = 153,018.63 : x
  2. Step 2: Convert to fraction form
    280,342.98/386,873.19 = 153,018.63/x
  3. Step 3: Cross multiply
    280,342.98x = 386,873.19 × 153,018.63
  4. Step 4: Simplify right side
    280,342.98x = 59,198,805,517.53
  5. Step 5: Solve for x
    x = 59,198,805,517.53/280,342.98
  6. Step 6: Final answer
    x = 211,165.64

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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.