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Finding the Fourth Proportional to 308,295, 462,442.68 and 86,679

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Solution

The fourth proportional to 308,295, 462,442.68 and 86,679 is: 130,018.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,295 : 462,442.68 = 86,679 : x
  2. Step 2: Convert to fraction form
    308,295/462,442.68 = 86,679/x
  3. Step 3: Cross multiply
    308,295x = 462,442.68 × 86,679
  4. Step 4: Simplify right side
    308,295x = 40,084,069,059.72
  5. Step 5: Solve for x
    x = 40,084,069,059.72/308,295
  6. Step 6: Final answer
    x = 130,018.55

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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.