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Finding the Fourth Proportional to 692.10, 955.06 and 397.39

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Solution

The fourth proportional to 692.10, 955.06 and 397.39 is: 548.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    692.10 : 955.06 = 397.39 : x
  2. Step 2: Convert to fraction form
    692.10/955.06 = 397.39/x
  3. Step 3: Cross multiply
    692.10x = 955.06 × 397.39
  4. Step 4: Simplify right side
    692.10x = 379,531.29
  5. Step 5: Solve for x
    x = 379,531.29/692.10
  6. Step 6: Final answer
    x = 548.38

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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.