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Finding the Fourth Proportional to 612,161.25, 917,715.98 and 212,750.13

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Solution

The fourth proportional to 612,161.25, 917,715.98 and 212,750.13 is: 318,942.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,161.25 : 917,715.98 = 212,750.13 : x
  2. Step 2: Convert to fraction form
    612,161.25/917,715.98 = 212,750.13/x
  3. Step 3: Cross multiply
    612,161.25x = 917,715.98 × 212,750.13
  4. Step 4: Simplify right side
    612,161.25x = 195,244,192,984.33
  5. Step 5: Solve for x
    x = 195,244,192,984.33/612,161.25
  6. Step 6: Final answer
    x = 318,942.42

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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.