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Finding the Fourth Proportional to 589.09, 812.57 and 379.54

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Solution

The fourth proportional to 589.09, 812.57 and 379.54 is: 523.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    589.09 : 812.57 = 379.54 : x
  2. Step 2: Convert to fraction form
    589.09/812.57 = 379.54/x
  3. Step 3: Cross multiply
    589.09x = 812.57 × 379.54
  4. Step 4: Simplify right side
    589.09x = 308,402.82
  5. Step 5: Solve for x
    x = 308,402.82/589.09
  6. Step 6: Final answer
    x = 523.52

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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.