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Finding the Fourth Proportional to 608.23, 908.15 and 521.43

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Solution

The fourth proportional to 608.23, 908.15 and 521.43 is: 778.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    608.23 : 908.15 = 521.43 : x
  2. Step 2: Convert to fraction form
    608.23/908.15 = 521.43/x
  3. Step 3: Cross multiply
    608.23x = 908.15 × 521.43
  4. Step 4: Simplify right side
    608.23x = 473,536.65
  5. Step 5: Solve for x
    x = 473,536.65/608.23
  6. Step 6: Final answer
    x = 778.55

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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.