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Finding the Fourth Proportional to 505,405.20, 758,107.80 and 131,428.20

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Solution

The fourth proportional to 505,405.20, 758,107.80 and 131,428.20 is: 197,142.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,405.20 : 758,107.80 = 131,428.20 : x
  2. Step 2: Convert to fraction form
    505,405.20/758,107.80 = 131,428.20/x
  3. Step 3: Cross multiply
    505,405.20x = 758,107.80 × 131,428.20
  4. Step 4: Simplify right side
    505,405.20x = 99,636,743,559.96
  5. Step 5: Solve for x
    x = 99,636,743,559.96/505,405.20
  6. Step 6: Final answer
    x = 197,142.30

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1.5x scale

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.