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Finding the Fourth Proportional to 667,085.28, 920,577.88 and 361,161.60

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Solution

The fourth proportional to 667,085.28, 920,577.88 and 361,161.60 is: 498,403.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,085.28 : 920,577.88 = 361,161.60 : x
  2. Step 2: Convert to fraction form
    667,085.28/920,577.88 = 361,161.60/x
  3. Step 3: Cross multiply
    667,085.28x = 920,577.88 × 361,161.60
  4. Step 4: Simplify right side
    667,085.28x = 332,477,380,065.41
  5. Step 5: Solve for x
    x = 332,477,380,065.41/667,085.28
  6. Step 6: Final answer
    x = 498,403.11

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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.