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Finding the Fourth Proportional to 583.99, 805.90 and 318.42

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Solution

The fourth proportional to 583.99, 805.90 and 318.42 is: 439.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    583.99 : 805.90 = 318.42 : x
  2. Step 2: Convert to fraction form
    583.99/805.90 = 318.42/x
  3. Step 3: Cross multiply
    583.99x = 805.90 × 318.42
  4. Step 4: Simplify right side
    583.99x = 256,614.68
  5. Step 5: Solve for x
    x = 256,614.68/583.99
  6. Step 6: Final answer
    x = 439.42

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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.