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Finding the Fourth Proportional to 520.01, 779.50 and 211.67

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Solution

The fourth proportional to 520.01, 779.50 and 211.67 is: 317.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    520.01 : 779.50 = 211.67 : x
  2. Step 2: Convert to fraction form
    520.01/779.50 = 211.67/x
  3. Step 3: Cross multiply
    520.01x = 779.50 × 211.67
  4. Step 4: Simplify right side
    520.01x = 164,998.11
  5. Step 5: Solve for x
    x = 164,998.11/520.01
  6. Step 6: Final answer
    x = 317.30

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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.