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Finding the Fourth Proportional to 692.16, 948.90 and 673.80

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Solution

The fourth proportional to 692.16, 948.90 and 673.80 is: 923.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    692.16 : 948.90 = 673.80 : x
  2. Step 2: Convert to fraction form
    692.16/948.90 = 673.80/x
  3. Step 3: Cross multiply
    692.16x = 948.90 × 673.80
  4. Step 4: Simplify right side
    692.16x = 639,368.82
  5. Step 5: Solve for x
    x = 639,368.82/692.16
  6. Step 6: Final answer
    x = 923.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.