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Finding the Fourth Proportional to 492,751.70, 739,127.55 and 212,815.70

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Solution

The fourth proportional to 492,751.70, 739,127.55 and 212,815.70 is: 319,223.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,751.70 : 739,127.55 = 212,815.70 : x
  2. Step 2: Convert to fraction form
    492,751.70/739,127.55 = 212,815.70/x
  3. Step 3: Cross multiply
    492,751.70x = 739,127.55 × 212,815.70
  4. Step 4: Simplify right side
    492,751.70x = 157,297,946,942.54
  5. Step 5: Solve for x
    x = 157,297,946,942.54/492,751.70
  6. Step 6: Final answer
    x = 319,223.55

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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.