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Finding the Fourth Proportional to 393.15, 586.44 and 359.84

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Solution

The fourth proportional to 393.15, 586.44 and 359.84 is: 536.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    393.15 : 586.44 = 359.84 : x
  2. Step 2: Convert to fraction form
    393.15/586.44 = 359.84/x
  3. Step 3: Cross multiply
    393.15x = 586.44 × 359.84
  4. Step 4: Simplify right side
    393.15x = 211,026.04
  5. Step 5: Solve for x
    x = 211,026.04/393.15
  6. Step 6: Final answer
    x = 536.75

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.