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Finding the Fourth Proportional to 274,718.76, 379,121.22 and 153,865.14

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Solution

The fourth proportional to 274,718.76, 379,121.22 and 153,865.14 is: 212,339.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    274,718.76 : 379,121.22 = 153,865.14 : x
  2. Step 2: Convert to fraction form
    274,718.76/379,121.22 = 153,865.14/x
  3. Step 3: Cross multiply
    274,718.76x = 379,121.22 × 153,865.14
  4. Step 4: Simplify right side
    274,718.76x = 58,333,539,592.27
  5. Step 5: Solve for x
    x = 58,333,539,592.27/274,718.76
  6. Step 6: Final answer
    x = 212,339.12

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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.