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Finding the Fourth Proportional to 667,020.96, 920,494.80 and 395,104.32

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Solution

The fourth proportional to 667,020.96, 920,494.80 and 395,104.32 is: 545,247.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,020.96 : 920,494.80 = 395,104.32 : x
  2. Step 2: Convert to fraction form
    667,020.96/920,494.80 = 395,104.32/x
  3. Step 3: Cross multiply
    667,020.96x = 920,494.80 × 395,104.32
  4. Step 4: Simplify right side
    667,020.96x = 363,691,472,017.54
  5. Step 5: Solve for x
    x = 363,691,472,017.54/667,020.96
  6. Step 6: Final answer
    x = 545,247.44

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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.