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Finding the Fourth Proportional to 420,739.60, 629,880.60 and 376,502.80

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Solution

The fourth proportional to 420,739.60, 629,880.60 and 376,502.80 is: 563,654.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,739.60 : 629,880.60 = 376,502.80 : x
  2. Step 2: Convert to fraction form
    420,739.60/629,880.60 = 376,502.80/x
  3. Step 3: Cross multiply
    420,739.60x = 629,880.60 × 376,502.80
  4. Step 4: Simplify right side
    420,739.60x = 237,151,809,565.68
  5. Step 5: Solve for x
    x = 237,151,809,565.68/420,739.60
  6. Step 6: Final answer
    x = 563,654.60

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.