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Finding the Fourth Proportional to 308,564.43, 462,680.23 and 139,992.79

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Solution

The fourth proportional to 308,564.43, 462,680.23 and 139,992.79 is: 209,913.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,564.43 : 462,680.23 = 139,992.79 : x
  2. Step 2: Convert to fraction form
    308,564.43/462,680.23 = 139,992.79/x
  3. Step 3: Cross multiply
    308,564.43x = 462,680.23 × 139,992.79
  4. Step 4: Simplify right side
    308,564.43x = 64,771,893,262.18
  5. Step 5: Solve for x
    x = 64,771,893,262.18/308,564.43
  6. Step 6: Final answer
    x = 209,913.67

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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.