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Finding the Fourth Proportional to 268,317.88, 402,490.60 and 68,640

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Solution

The fourth proportional to 268,317.88, 402,490.60 and 68,640 is: 102,963.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,317.88 : 402,490.60 = 68,640 : x
  2. Step 2: Convert to fraction form
    268,317.88/402,490.60 = 68,640/x
  3. Step 3: Cross multiply
    268,317.88x = 402,490.60 × 68,640
  4. Step 4: Simplify right side
    268,317.88x = 27,626,954,784
  5. Step 5: Solve for x
    x = 27,626,954,784/268,317.88
  6. Step 6: Final answer
    x = 102,963.53

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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.