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Finding the Fourth Proportional to 274,911.10, 385,428.50 and 274,911.10

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Solution

The fourth proportional to 274,911.10, 385,428.50 and 274,911.10 is: 385,428.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    274,911.10 : 385,428.50 = 274,911.10 : x
  2. Step 2: Convert to fraction form
    274,911.10/385,428.50 = 274,911.10/x
  3. Step 3: Cross multiply
    274,911.10x = 385,428.50 × 274,911.10
  4. Step 4: Simplify right side
    274,911.10x = 105,958,572,906.35
  5. Step 5: Solve for x
    x = 105,958,572,906.35/274,911.10
  6. Step 6: Final answer
    x = 385,428.50

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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.