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Finding the Fourth Proportional to 434.11, 648.11 and 425.62

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Solution

The fourth proportional to 434.11, 648.11 and 425.62 is: 635.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    434.11 : 648.11 = 425.62 : x
  2. Step 2: Convert to fraction form
    434.11/648.11 = 425.62/x
  3. Step 3: Cross multiply
    434.11x = 648.11 × 425.62
  4. Step 4: Simplify right side
    434.11x = 275,848.58
  5. Step 5: Solve for x
    x = 275,848.58/434.11
  6. Step 6: Final answer
    x = 635.43

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.