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Finding the Fourth Proportional to 692.49, 1,036.85 and 448.41

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Solution

The fourth proportional to 692.49, 1,036.85 and 448.41 is: 671.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    692.49 : 1,036.85 = 448.41 : x
  2. Step 2: Convert to fraction form
    692.49/1,036.85 = 448.41/x
  3. Step 3: Cross multiply
    692.49x = 1,036.85 × 448.41
  4. Step 4: Simplify right side
    692.49x = 464,931.67
  5. Step 5: Solve for x
    x = 464,931.67/692.49
  6. Step 6: Final answer
    x = 671.39

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.