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Finding the Fourth Proportional to 692.42, 1,037.81 and 281.00

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Solution

The fourth proportional to 692.42, 1,037.81 and 281.00 is: 421.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    692.42 : 1,037.81 = 281.00 : x
  2. Step 2: Convert to fraction form
    692.42/1,037.81 = 281.00/x
  3. Step 3: Cross multiply
    692.42x = 1,037.81 × 281.00
  4. Step 4: Simplify right side
    692.42x = 291,627.91
  5. Step 5: Solve for x
    x = 291,627.91/692.42
  6. Step 6: Final answer
    x = 421.18

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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.