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Finding the Fourth Proportional to 268,999.78, 371,220.80 and 154,282.84

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Solution

The fourth proportional to 268,999.78, 371,220.80 and 154,282.84 is: 212,910.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,999.78 : 371,220.80 = 154,282.84 : x
  2. Step 2: Convert to fraction form
    268,999.78/371,220.80 = 154,282.84/x
  3. Step 3: Cross multiply
    268,999.78x = 371,220.80 × 154,282.84
  4. Step 4: Simplify right side
    268,999.78x = 57,272,999,291.07
  5. Step 5: Solve for x
    x = 57,272,999,291.07/268,999.78
  6. Step 6: Final answer
    x = 212,910.95

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.