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Finding the Fourth Proportional to 431.03, 650.07 and 426.44

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Solution

The fourth proportional to 431.03, 650.07 and 426.44 is: 643.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    431.03 : 650.07 = 426.44 : x
  2. Step 2: Convert to fraction form
    431.03/650.07 = 426.44/x
  3. Step 3: Cross multiply
    431.03x = 650.07 × 426.44
  4. Step 4: Simplify right side
    431.03x = 277,215.85
  5. Step 5: Solve for x
    x = 277,215.85/431.03
  6. Step 6: Final answer
    x = 643.15

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.