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Finding the Fourth Proportional to 589.12, 812.72 and 379.25

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Solution

The fourth proportional to 589.12, 812.72 and 379.25 is: 523.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    589.12 : 812.72 = 379.25 : x
  2. Step 2: Convert to fraction form
    589.12/812.72 = 379.25/x
  3. Step 3: Cross multiply
    589.12x = 812.72 × 379.25
  4. Step 4: Simplify right side
    589.12x = 308,222.16
  5. Step 5: Solve for x
    x = 308,222.16/589.12
  6. Step 6: Final answer
    x = 523.20

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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.