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Finding the Fourth Proportional to 692.88, 957.97 and 662.28

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Solution

The fourth proportional to 692.88, 957.97 and 662.28 is: 915.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    692.88 : 957.97 = 662.28 : x
  2. Step 2: Convert to fraction form
    692.88/957.97 = 662.28/x
  3. Step 3: Cross multiply
    692.88x = 957.97 × 662.28
  4. Step 4: Simplify right side
    692.88x = 634,444.37
  5. Step 5: Solve for x
    x = 634,444.37/692.88
  6. Step 6: Final answer
    x = 915.66

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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.