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Finding the Fourth Proportional to 630.41, 945.55 and 426.29

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Solution

The fourth proportional to 630.41, 945.55 and 426.29 is: 639.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    630.41 : 945.55 = 426.29 : x
  2. Step 2: Convert to fraction form
    630.41/945.55 = 426.29/x
  3. Step 3: Cross multiply
    630.41x = 945.55 × 426.29
  4. Step 4: Simplify right side
    630.41x = 403,078.51
  5. Step 5: Solve for x
    x = 403,078.51/630.41
  6. Step 6: Final answer
    x = 639.39

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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.