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Finding the Fourth Proportional to 408,536.40, 613,460.70 and 308,809.20

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Solution

The fourth proportional to 408,536.40, 613,460.70 and 308,809.20 is: 463,709.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,536.40 : 613,460.70 = 308,809.20 : x
  2. Step 2: Convert to fraction form
    408,536.40/613,460.70 = 308,809.20/x
  3. Step 3: Cross multiply
    408,536.40x = 613,460.70 × 308,809.20
  4. Step 4: Simplify right side
    408,536.40x = 189,442,307,998.44
  5. Step 5: Solve for x
    x = 189,442,307,998.44/408,536.40
  6. Step 6: Final answer
    x = 463,709.74

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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.