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Finding the Fourth Proportional to 308,236, 462,354 and 86,620

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Solution

The fourth proportional to 308,236, 462,354 and 86,620 is: 129,930

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,236 : 462,354 = 86,620 : x
  2. Step 2: Convert to fraction form
    308,236/462,354 = 86,620/x
  3. Step 3: Cross multiply
    308,236x = 462,354 × 86,620
  4. Step 4: Simplify right side
    308,236x = 40,049,103,480
  5. Step 5: Solve for x
    x = 40,049,103,480/308,236
  6. Step 6: Final answer
    x = 129,930

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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.