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Finding the Fourth Proportional to 315,095.80, 472,989.30 and 196,900.60

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Solution

The fourth proportional to 315,095.80, 472,989.30 and 196,900.60 is: 295,566.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,095.80 : 472,989.30 = 196,900.60 : x
  2. Step 2: Convert to fraction form
    315,095.80/472,989.30 = 196,900.60/x
  3. Step 3: Cross multiply
    315,095.80x = 472,989.30 × 196,900.60
  4. Step 4: Simplify right side
    315,095.80x = 93,131,876,963.58
  5. Step 5: Solve for x
    x = 93,131,876,963.58/315,095.80
  6. Step 6: Final answer
    x = 295,566.86

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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.