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Finding the Fourth Proportional to 692.19, 955.38 and 443.72

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Solution

The fourth proportional to 692.19, 955.38 and 443.72 is: 612.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    692.19 : 955.38 = 443.72 : x
  2. Step 2: Convert to fraction form
    692.19/955.38 = 443.72/x
  3. Step 3: Cross multiply
    692.19x = 955.38 × 443.72
  4. Step 4: Simplify right side
    692.19x = 423,916.44
  5. Step 5: Solve for x
    x = 423,916.44/692.19
  6. Step 6: Final answer
    x = 612.43

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.