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Finding the Fourth Proportional to 274,607.84, 378,940.48 and 153,728.72

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Solution

The fourth proportional to 274,607.84, 378,940.48 and 153,728.72 is: 212,135.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    274,607.84 : 378,940.48 = 153,728.72 : x
  2. Step 2: Convert to fraction form
    274,607.84/378,940.48 = 153,728.72/x
  3. Step 3: Cross multiply
    274,607.84x = 378,940.48 × 153,728.72
  4. Step 4: Simplify right side
    274,607.84x = 58,254,034,946.59
  5. Step 5: Solve for x
    x = 58,254,034,946.59/274,607.84
  6. Step 6: Final answer
    x = 212,135.37

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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.