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Finding the Fourth Proportional to 274,986.76, 379,492.16 and 154,130.28

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Solution

The fourth proportional to 274,986.76, 379,492.16 and 154,130.28 is: 212,705.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    274,986.76 : 379,492.16 = 154,130.28 : x
  2. Step 2: Convert to fraction form
    274,986.76/379,492.16 = 154,130.28/x
  3. Step 3: Cross multiply
    274,986.76x = 379,492.16 × 154,130.28
  4. Step 4: Simplify right side
    274,986.76x = 58,491,232,878.60
  5. Step 5: Solve for x
    x = 58,491,232,878.60/274,986.76
  6. Step 6: Final answer
    x = 212,705.63

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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.