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Finding the Fourth Proportional to 445.96, 665.30 and 425.32

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Solution

The fourth proportional to 445.96, 665.30 and 425.32 is: 634.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.96 : 665.30 = 425.32 : x
  2. Step 2: Convert to fraction form
    445.96/665.30 = 425.32/x
  3. Step 3: Cross multiply
    445.96x = 665.30 × 425.32
  4. Step 4: Simplify right side
    445.96x = 282,965.40
  5. Step 5: Solve for x
    x = 282,965.40/445.96
  6. Step 6: Final answer
    x = 634.51

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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.