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Finding the Fourth Proportional to 257,398.47, 386,232.30 and 186,903.45

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Solution

The fourth proportional to 257,398.47, 386,232.30 and 186,903.45 is: 280,452.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,398.47 : 386,232.30 = 186,903.45 : x
  2. Step 2: Convert to fraction form
    257,398.47/386,232.30 = 186,903.45/x
  3. Step 3: Cross multiply
    257,398.47x = 386,232.30 × 186,903.45
  4. Step 4: Simplify right side
    257,398.47x = 72,188,149,371.44
  5. Step 5: Solve for x
    x = 72,188,149,371.44/257,398.47
  6. Step 6: Final answer
    x = 280,452.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.