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Finding the Fourth Proportional to 692.08, 955.11 and 397.38

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Solution

The fourth proportional to 692.08, 955.11 and 397.38 is: 548.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    692.08 : 955.11 = 397.38 : x
  2. Step 2: Convert to fraction form
    692.08/955.11 = 397.38/x
  3. Step 3: Cross multiply
    692.08x = 955.11 × 397.38
  4. Step 4: Simplify right side
    692.08x = 379,541.61
  5. Step 5: Solve for x
    x = 379,541.61/692.08
  6. Step 6: Final answer
    x = 548.41

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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.