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Finding the Fourth Proportional to 608.21, 910.09 and 520.43

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Solution

The fourth proportional to 608.21, 910.09 and 520.43 is: 778.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    608.21 : 910.09 = 520.43 : x
  2. Step 2: Convert to fraction form
    608.21/910.09 = 520.43/x
  3. Step 3: Cross multiply
    608.21x = 910.09 × 520.43
  4. Step 4: Simplify right side
    608.21x = 473,638.14
  5. Step 5: Solve for x
    x = 473,638.14/608.21
  6. Step 6: Final answer
    x = 778.74

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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.