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Finding the Fourth Proportional to 452.72, 624.34 and 286.65

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Solution

The fourth proportional to 452.72, 624.34 and 286.65 is: 395.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    452.72 : 624.34 = 286.65 : x
  2. Step 2: Convert to fraction form
    452.72/624.34 = 286.65/x
  3. Step 3: Cross multiply
    452.72x = 624.34 × 286.65
  4. Step 4: Simplify right side
    452.72x = 178,965.63
  5. Step 5: Solve for x
    x = 178,965.63/452.72
  6. Step 6: Final answer
    x = 395.31

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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.