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Finding the Fourth Proportional to 667,055.25, 920,529.86 and 361,123.79

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Solution

The fourth proportional to 667,055.25, 920,529.86 and 361,123.79 is: 498,347.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,055.25 : 920,529.86 = 361,123.79 : x
  2. Step 2: Convert to fraction form
    667,055.25/920,529.86 = 361,123.79/x
  3. Step 3: Cross multiply
    667,055.25x = 920,529.86 × 361,123.79
  4. Step 4: Simplify right side
    667,055.25x = 332,425,232,347.08
  5. Step 5: Solve for x
    x = 332,425,232,347.08/667,055.25
  6. Step 6: Final answer
    x = 498,347.37

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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.