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Finding the Fourth Proportional to 257,571.20, 386,356.80 and 163,092.80

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Solution

The fourth proportional to 257,571.20, 386,356.80 and 163,092.80 is: 244,639.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,571.20 : 386,356.80 = 163,092.80 : x
  2. Step 2: Convert to fraction form
    257,571.20/386,356.80 = 163,092.80/x
  3. Step 3: Cross multiply
    257,571.20x = 386,356.80 × 163,092.80
  4. Step 4: Simplify right side
    257,571.20x = 63,012,012,311.04
  5. Step 5: Solve for x
    x = 63,012,012,311.04/257,571.20
  6. Step 6: Final answer
    x = 244,639.20

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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.