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Finding the Fourth Proportional to 355,638.29, 490,959.30 and 274,883.31

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Solution

The fourth proportional to 355,638.29, 490,959.30 and 274,883.31 is: 379,476.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,638.29 : 490,959.30 = 274,883.31 : x
  2. Step 2: Convert to fraction form
    355,638.29/490,959.30 = 274,883.31/x
  3. Step 3: Cross multiply
    355,638.29x = 490,959.30 × 274,883.31
  4. Step 4: Simplify right side
    355,638.29x = 134,956,517,459.28
  5. Step 5: Solve for x
    x = 134,956,517,459.28/355,638.29
  6. Step 6: Final answer
    x = 379,476.91

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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.