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Finding the Fourth Proportional to 388,363.40, 582,516.30 and 163,665.80

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Solution

The fourth proportional to 388,363.40, 582,516.30 and 163,665.80 is: 245,486.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,363.40 : 582,516.30 = 163,665.80 : x
  2. Step 2: Convert to fraction form
    388,363.40/582,516.30 = 163,665.80/x
  3. Step 3: Cross multiply
    388,363.40x = 582,516.30 × 163,665.80
  4. Step 4: Simplify right side
    388,363.40x = 95,337,996,252.54
  5. Step 5: Solve for x
    x = 95,337,996,252.54/388,363.40
  6. Step 6: Final answer
    x = 245,486.56

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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.