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Finding the Fourth Proportional to 858.80, 1,184.38 and 692.96

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Solution

The fourth proportional to 858.80, 1,184.38 and 692.96 is: 955.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    858.80 : 1,184.38 = 692.96 : x
  2. Step 2: Convert to fraction form
    858.80/1,184.38 = 692.96/x
  3. Step 3: Cross multiply
    858.80x = 1,184.38 × 692.96
  4. Step 4: Simplify right side
    858.80x = 820,727.96
  5. Step 5: Solve for x
    x = 820,727.96/858.80
  6. Step 6: Final answer
    x = 955.67

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Double scale
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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.