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Finding the Fourth Proportional to 285.15, 393.53 and 174.68

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Solution

The fourth proportional to 285.15, 393.53 and 174.68 is: 241.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    285.15 : 393.53 = 174.68 : x
  2. Step 2: Convert to fraction form
    285.15/393.53 = 174.68/x
  3. Step 3: Cross multiply
    285.15x = 393.53 × 174.68
  4. Step 4: Simplify right side
    285.15x = 68,741.82
  5. Step 5: Solve for x
    x = 68,741.82/285.15
  6. Step 6: Final answer
    x = 241.07

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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.