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Finding the Fourth Proportional to 644,994.90, 967,243.41 and 212,608.53

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Solution

The fourth proportional to 644,994.90, 967,243.41 and 212,608.53 is: 318,830.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,994.90 : 967,243.41 = 212,608.53 : x
  2. Step 2: Convert to fraction form
    644,994.90/967,243.41 = 212,608.53/x
  3. Step 3: Cross multiply
    644,994.90x = 967,243.41 × 212,608.53
  4. Step 4: Simplify right side
    644,994.90x = 205,644,199,552.29
  5. Step 5: Solve for x
    x = 205,644,199,552.29/644,994.90
  6. Step 6: Final answer
    x = 318,830.74

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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.