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Finding the Fourth Proportional to 445.71, 664.93 and 425.07

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Solution

The fourth proportional to 445.71, 664.93 and 425.07 is: 634.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.71 : 664.93 = 425.07 : x
  2. Step 2: Convert to fraction form
    445.71/664.93 = 425.07/x
  3. Step 3: Cross multiply
    445.71x = 664.93 × 425.07
  4. Step 4: Simplify right side
    445.71x = 282,640.73
  5. Step 5: Solve for x
    x = 282,640.73/445.71
  6. Step 6: Final answer
    x = 634.14

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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.