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Finding the Fourth Proportional to 502.05, 692.59 and 305.67

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Solution

The fourth proportional to 502.05, 692.59 and 305.67 is: 421.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    502.05 : 692.59 = 305.67 : x
  2. Step 2: Convert to fraction form
    502.05/692.59 = 305.67/x
  3. Step 3: Cross multiply
    502.05x = 692.59 × 305.67
  4. Step 4: Simplify right side
    502.05x = 211,703.99
  5. Step 5: Solve for x
    x = 211,703.99/502.05
  6. Step 6: Final answer
    x = 421.68

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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.