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Finding the Fourth Proportional to 425.33, 634.47 and 418.29

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Solution

The fourth proportional to 425.33, 634.47 and 418.29 is: 623.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    425.33 : 634.47 = 418.29 : x
  2. Step 2: Convert to fraction form
    425.33/634.47 = 418.29/x
  3. Step 3: Cross multiply
    425.33x = 634.47 × 418.29
  4. Step 4: Simplify right side
    425.33x = 265,388.51
  5. Step 5: Solve for x
    x = 265,388.51/425.33
  6. Step 6: Final answer
    x = 623.95

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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.