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Finding the Fourth Proportional to 376.18, 561.55 and 325.15

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Solution

The fourth proportional to 376.18, 561.55 and 325.15 is: 485.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    376.18 : 561.55 = 325.15 : x
  2. Step 2: Convert to fraction form
    376.18/561.55 = 325.15/x
  3. Step 3: Cross multiply
    376.18x = 561.55 × 325.15
  4. Step 4: Simplify right side
    376.18x = 182,586.36
  5. Step 5: Solve for x
    x = 182,586.36/376.18
  6. Step 6: Final answer
    x = 485.37

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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.