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Finding the Fourth Proportional to 418,387.62, 577,379.43 and 227,401.05

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Solution

The fourth proportional to 418,387.62, 577,379.43 and 227,401.05 is: 313,815.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,387.62 : 577,379.43 = 227,401.05 : x
  2. Step 2: Convert to fraction form
    418,387.62/577,379.43 = 227,401.05/x
  3. Step 3: Cross multiply
    418,387.62x = 577,379.43 × 227,401.05
  4. Step 4: Simplify right side
    418,387.62x = 131,296,688,630.40
  5. Step 5: Solve for x
    x = 131,296,688,630.40/418,387.62
  6. Step 6: Final answer
    x = 313,815.90

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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.