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Finding the Fourth Proportional to 274,912.10, 385,429.90 and 274,912.10

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Solution

The fourth proportional to 274,912.10, 385,429.90 and 274,912.10 is: 385,429.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    274,912.10 : 385,429.90 = 274,912.10 : x
  2. Step 2: Convert to fraction form
    274,912.10/385,429.90 = 274,912.10/x
  3. Step 3: Cross multiply
    274,912.10x = 385,429.90 × 274,912.10
  4. Step 4: Simplify right side
    274,912.10x = 105,959,343,211.79
  5. Step 5: Solve for x
    x = 105,959,343,211.79/274,912.10
  6. Step 6: Final answer
    x = 385,429.90

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.