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Finding the Fourth Proportional to 445.77, 664.29 and 433.26

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Solution

The fourth proportional to 445.77, 664.29 and 433.26 is: 645.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.77 : 664.29 = 433.26 : x
  2. Step 2: Convert to fraction form
    445.77/664.29 = 433.26/x
  3. Step 3: Cross multiply
    445.77x = 664.29 × 433.26
  4. Step 4: Simplify right side
    445.77x = 287,810.29
  5. Step 5: Solve for x
    x = 287,810.29/445.77
  6. Step 6: Final answer
    x = 645.65

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Double scale
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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.