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Finding the Fourth Proportional to 608.66, 912.72 and 426.14

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Solution

The fourth proportional to 608.66, 912.72 and 426.14 is: 639.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    608.66 : 912.72 = 426.14 : x
  2. Step 2: Convert to fraction form
    608.66/912.72 = 426.14/x
  3. Step 3: Cross multiply
    608.66x = 912.72 × 426.14
  4. Step 4: Simplify right side
    608.66x = 388,946.50
  5. Step 5: Solve for x
    x = 388,946.50/608.66
  6. Step 6: Final answer
    x = 639.02

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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.