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Finding the Fourth Proportional to 505,455, 758,226.24 and 131,478

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Solution

The fourth proportional to 505,455, 758,226.24 and 131,478 is: 197,228.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,455 : 758,226.24 = 131,478 : x
  2. Step 2: Convert to fraction form
    505,455/758,226.24 = 131,478/x
  3. Step 3: Cross multiply
    505,455x = 758,226.24 × 131,478
  4. Step 4: Simplify right side
    505,455x = 99,690,069,582.72
  5. Step 5: Solve for x
    x = 99,690,069,582.72/505,455
  6. Step 6: Final answer
    x = 197,228.38

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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.