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Finding the Fourth Proportional to 268,988.73, 403,388.79 and 79,398.51

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Solution

The fourth proportional to 268,988.73, 403,388.79 and 79,398.51 is: 119,069.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,988.73 : 403,388.79 = 79,398.51 : x
  2. Step 2: Convert to fraction form
    268,988.73/403,388.79 = 79,398.51/x
  3. Step 3: Cross multiply
    268,988.73x = 403,388.79 × 79,398.51
  4. Step 4: Simplify right side
    268,988.73x = 32,028,468,876.70
  5. Step 5: Solve for x
    x = 32,028,468,876.70/268,988.73
  6. Step 6: Final answer
    x = 119,069.93

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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.