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Finding the Fourth Proportional to 712.99, 983.84 and 418.42

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Solution

The fourth proportional to 712.99, 983.84 and 418.42 is: 577.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    712.99 : 983.84 = 418.42 : x
  2. Step 2: Convert to fraction form
    712.99/983.84 = 418.42/x
  3. Step 3: Cross multiply
    712.99x = 983.84 × 418.42
  4. Step 4: Simplify right side
    712.99x = 411,658.33
  5. Step 5: Solve for x
    x = 411,658.33/712.99
  6. Step 6: Final answer
    x = 577.37

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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.