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Finding the Fourth Proportional to 308,221.80, 462,332.70 and 86,605.80

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Solution

The fourth proportional to 308,221.80, 462,332.70 and 86,605.80 is: 129,908.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,221.80 : 462,332.70 = 86,605.80 : x
  2. Step 2: Convert to fraction form
    308,221.80/462,332.70 = 86,605.80/x
  3. Step 3: Cross multiply
    308,221.80x = 462,332.70 × 86,605.80
  4. Step 4: Simplify right side
    308,221.80x = 40,040,693,349.66
  5. Step 5: Solve for x
    x = 40,040,693,349.66/308,221.80
  6. Step 6: Final answer
    x = 129,908.70

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1.5x scale

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.