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Finding the Fourth Proportional to 418,395.20, 577,388.90 and 227,408.56

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Solution

The fourth proportional to 418,395.20, 577,388.90 and 227,408.56 is: 313,825.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,395.20 : 577,388.90 = 227,408.56 : x
  2. Step 2: Convert to fraction form
    418,395.20/577,388.90 = 227,408.56/x
  3. Step 3: Cross multiply
    418,395.20x = 577,388.90 × 227,408.56
  4. Step 4: Simplify right side
    418,395.20x = 131,303,178,308.98
  5. Step 5: Solve for x
    x = 131,303,178,308.98/418,395.20
  6. Step 6: Final answer
    x = 313,825.73

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1.5x scale

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.