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Finding the Fourth Proportional to 540.87, 810.54 and 266.67

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Solution

The fourth proportional to 540.87, 810.54 and 266.67 is: 399.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    540.87 : 810.54 = 266.67 : x
  2. Step 2: Convert to fraction form
    540.87/810.54 = 266.67/x
  3. Step 3: Cross multiply
    540.87x = 810.54 × 266.67
  4. Step 4: Simplify right side
    540.87x = 216,146.70
  5. Step 5: Solve for x
    x = 216,146.70/540.87
  6. Step 6: Final answer
    x = 399.63

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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.