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Finding the Fourth Proportional to 540.92, 810.57 and 419.42

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Solution

The fourth proportional to 540.92, 810.57 and 419.42 is: 628.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    540.92 : 810.57 = 419.42 : x
  2. Step 2: Convert to fraction form
    540.92/810.57 = 419.42/x
  3. Step 3: Cross multiply
    540.92x = 810.57 × 419.42
  4. Step 4: Simplify right side
    540.92x = 339,969.27
  5. Step 5: Solve for x
    x = 339,969.27/540.92
  6. Step 6: Final answer
    x = 628.50

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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.