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Finding the Fourth Proportional to 608.72, 912.18 and 320.36

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Solution

The fourth proportional to 608.72, 912.18 and 320.36 is: 480.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    608.72 : 912.18 = 320.36 : x
  2. Step 2: Convert to fraction form
    608.72/912.18 = 320.36/x
  3. Step 3: Cross multiply
    608.72x = 912.18 × 320.36
  4. Step 4: Simplify right side
    608.72x = 292,225.98
  5. Step 5: Solve for x
    x = 292,225.98/608.72
  6. Step 6: Final answer
    x = 480.07

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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.