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Finding the Fourth Proportional to 665,999.05, 918,465.40 and 436,472.73

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Solution

The fourth proportional to 665,999.05, 918,465.40 and 436,472.73 is: 601,930.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,999.05 : 918,465.40 = 436,472.73 : x
  2. Step 2: Convert to fraction form
    665,999.05/918,465.40 = 436,472.73/x
  3. Step 3: Cross multiply
    665,999.05x = 918,465.40 × 436,472.73
  4. Step 4: Simplify right side
    665,999.05x = 400,885,100,548.54
  5. Step 5: Solve for x
    x = 400,885,100,548.54/665,999.05
  6. Step 6: Final answer
    x = 601,930.44

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.