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Finding the Fourth Proportional to 608.96, 913.90 and 425.16

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Solution

The fourth proportional to 608.96, 913.90 and 425.16 is: 638.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    608.96 : 913.90 = 425.16 : x
  2. Step 2: Convert to fraction form
    608.96/913.90 = 425.16/x
  3. Step 3: Cross multiply
    608.96x = 913.90 × 425.16
  4. Step 4: Simplify right side
    608.96x = 388,553.72
  5. Step 5: Solve for x
    x = 388,553.72/608.96
  6. Step 6: Final answer
    x = 638.06

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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.