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Finding the Fourth Proportional to 1,294.42, 1,940.36 and 514.16

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Solution

The fourth proportional to 1,294.42, 1,940.36 and 514.16 is: 770.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,294.42 : 1,940.36 = 514.16 : x
  2. Step 2: Convert to fraction form
    1,294.42/1,940.36 = 514.16/x
  3. Step 3: Cross multiply
    1,294.42x = 1,940.36 × 514.16
  4. Step 4: Simplify right side
    1,294.42x = 997,643.23
  5. Step 5: Solve for x
    x = 997,643.23/1,294.42
  6. Step 6: Final answer
    x = 770.73

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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.