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Finding the Fourth Proportional to 388,355.95, 582,622.14 and 118,508.21

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Solution

The fourth proportional to 388,355.95, 582,622.14 and 118,508.21 is: 177,789.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,355.95 : 582,622.14 = 118,508.21 : x
  2. Step 2: Convert to fraction form
    388,355.95/582,622.14 = 118,508.21/x
  3. Step 3: Cross multiply
    388,355.95x = 582,622.14 × 118,508.21
  4. Step 4: Simplify right side
    388,355.95x = 69,045,504,004.66
  5. Step 5: Solve for x
    x = 69,045,504,004.66/388,355.95
  6. Step 6: Final answer
    x = 177,789.23

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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.