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Finding the Fourth Proportional to 692.15, 955.13 and 377.40

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Solution

The fourth proportional to 692.15, 955.13 and 377.40 is: 520.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    692.15 : 955.13 = 377.40 : x
  2. Step 2: Convert to fraction form
    692.15/955.13 = 377.40/x
  3. Step 3: Cross multiply
    692.15x = 955.13 × 377.40
  4. Step 4: Simplify right side
    692.15x = 360,467.01
  5. Step 5: Solve for x
    x = 360,467.01/692.15
  6. Step 6: Final answer
    x = 520.80

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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.