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Finding the Fourth Proportional to 800.70, 1,103.67 and 692.70

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Solution

The fourth proportional to 800.70, 1,103.67 and 692.70 is: 954.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    800.70 : 1,103.67 = 692.70 : x
  2. Step 2: Convert to fraction form
    800.70/1,103.67 = 692.70/x
  3. Step 3: Cross multiply
    800.70x = 1,103.67 × 692.70
  4. Step 4: Simplify right side
    800.70x = 764,512.21
  5. Step 5: Solve for x
    x = 764,512.21/800.70
  6. Step 6: Final answer
    x = 954.80

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1.5x scale

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.