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Finding the Fourth Proportional to 608.36, 908.34 and 521.55

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Solution

The fourth proportional to 608.36, 908.34 and 521.55 is: 778.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    608.36 : 908.34 = 521.55 : x
  2. Step 2: Convert to fraction form
    608.36/908.34 = 521.55/x
  3. Step 3: Cross multiply
    608.36x = 908.34 × 521.55
  4. Step 4: Simplify right side
    608.36x = 473,742.77
  5. Step 5: Solve for x
    x = 473,742.77/608.36
  6. Step 6: Final answer
    x = 778.73

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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.