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Finding the Fourth Proportional to 667,086.96, 920,573.60 and 361,155.50

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Solution

The fourth proportional to 667,086.96, 920,573.60 and 361,155.50 is: 498,391.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,086.96 : 920,573.60 = 361,155.50 : x
  2. Step 2: Convert to fraction form
    667,086.96/920,573.60 = 361,155.50/x
  3. Step 3: Cross multiply
    667,086.96x = 920,573.60 × 361,155.50
  4. Step 4: Simplify right side
    667,086.96x = 332,470,212,386.16
  5. Step 5: Solve for x
    x = 332,470,212,386.16/667,086.96
  6. Step 6: Final answer
    x = 498,391.11

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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.