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Finding the Fourth Proportional to 445,760.64, 668,635.70 and 208,936.08

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Solution

The fourth proportional to 445,760.64, 668,635.70 and 208,936.08 is: 313,401.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,760.64 : 668,635.70 = 208,936.08 : x
  2. Step 2: Convert to fraction form
    445,760.64/668,635.70 = 208,936.08/x
  3. Step 3: Cross multiply
    445,760.64x = 668,635.70 × 208,936.08
  4. Step 4: Simplify right side
    445,760.64x = 139,702,121,061.38
  5. Step 5: Solve for x
    x = 139,702,121,061.38/445,760.64
  6. Step 6: Final answer
    x = 313,401.65

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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.