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Finding the Fourth Proportional to 308,242, 462,363 and 86,626

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Solution

The fourth proportional to 308,242, 462,363 and 86,626 is: 129,939

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,242 : 462,363 = 86,626 : x
  2. Step 2: Convert to fraction form
    308,242/462,363 = 86,626/x
  3. Step 3: Cross multiply
    308,242x = 462,363 × 86,626
  4. Step 4: Simplify right side
    308,242x = 40,052,657,238
  5. Step 5: Solve for x
    x = 40,052,657,238/308,242
  6. Step 6: Final answer
    x = 129,939

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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.