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Finding the Fourth Proportional to 324.42, 484.35 and 285.23

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Solution

The fourth proportional to 324.42, 484.35 and 285.23 is: 425.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    324.42 : 484.35 = 285.23 : x
  2. Step 2: Convert to fraction form
    324.42/484.35 = 285.23/x
  3. Step 3: Cross multiply
    324.42x = 484.35 × 285.23
  4. Step 4: Simplify right side
    324.42x = 138,151.15
  5. Step 5: Solve for x
    x = 138,151.15/324.42
  6. Step 6: Final answer
    x = 425.84

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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.