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Finding the Fourth Proportional to 608.30, 912.75 and 243.40

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Solution

The fourth proportional to 608.30, 912.75 and 243.40 is: 365.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    608.30 : 912.75 = 243.40 : x
  2. Step 2: Convert to fraction form
    608.30/912.75 = 243.40/x
  3. Step 3: Cross multiply
    608.30x = 912.75 × 243.40
  4. Step 4: Simplify right side
    608.30x = 222,158.79
  5. Step 5: Solve for x
    x = 222,158.79/608.30
  6. Step 6: Final answer
    x = 365.21

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.