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Finding the Fourth Proportional to 1,294.16, 1,940.15 and 513.67

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Solution

The fourth proportional to 1,294.16, 1,940.15 and 513.67 is: 770.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,294.16 : 1,940.15 = 513.67 : x
  2. Step 2: Convert to fraction form
    1,294.16/1,940.15 = 513.67/x
  3. Step 3: Cross multiply
    1,294.16x = 1,940.15 × 513.67
  4. Step 4: Simplify right side
    1,294.16x = 996,593.28
  5. Step 5: Solve for x
    x = 996,593.28/1,294.16
  6. Step 6: Final answer
    x = 770.07

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.