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Finding the Fourth Proportional to 644,351.72, 966,646.47 and 212,093.60

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Solution

The fourth proportional to 644,351.72, 966,646.47 and 212,093.60 is: 318,179.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,351.72 : 966,646.47 = 212,093.60 : x
  2. Step 2: Convert to fraction form
    644,351.72/966,646.47 = 212,093.60/x
  3. Step 3: Cross multiply
    644,351.72x = 966,646.47 × 212,093.60
  4. Step 4: Simplify right side
    644,351.72x = 205,019,529,749.59
  5. Step 5: Solve for x
    x = 205,019,529,749.59/644,351.72
  6. Step 6: Final answer
    x = 318,179.53

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1.5x scale

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.