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Finding the Fourth Proportional to 414,879.40, 620,763.90 and 274,911.40

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Solution

The fourth proportional to 414,879.40, 620,763.90 and 274,911.40 is: 411,336.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    414,879.40 : 620,763.90 = 274,911.40 : x
  2. Step 2: Convert to fraction form
    414,879.40/620,763.90 = 274,911.40/x
  3. Step 3: Cross multiply
    414,879.40x = 620,763.90 × 274,911.40
  4. Step 4: Simplify right side
    414,879.40x = 170,655,072,818.46
  5. Step 5: Solve for x
    x = 170,655,072,818.46/414,879.40
  6. Step 6: Final answer
    x = 411,336.58

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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.