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Finding the Fourth Proportional to 511.29, 766.35 and 401.67

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Solution

The fourth proportional to 511.29, 766.35 and 401.67 is: 602.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    511.29 : 766.35 = 401.67 : x
  2. Step 2: Convert to fraction form
    511.29/766.35 = 401.67/x
  3. Step 3: Cross multiply
    511.29x = 766.35 × 401.67
  4. Step 4: Simplify right side
    511.29x = 307,819.80
  5. Step 5: Solve for x
    x = 307,819.80/511.29
  6. Step 6: Final answer
    x = 602.05

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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.