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Finding the Fourth Proportional to 481,282.78, 664,345.44 and 280,078.78

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Solution

The fourth proportional to 481,282.78, 664,345.44 and 280,078.78 is: 386,610.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    481,282.78 : 664,345.44 = 280,078.78 : x
  2. Step 2: Convert to fraction form
    481,282.78/664,345.44 = 280,078.78/x
  3. Step 3: Cross multiply
    481,282.78x = 664,345.44 × 280,078.78
  4. Step 4: Simplify right side
    481,282.78x = 186,069,060,333.76
  5. Step 5: Solve for x
    x = 186,069,060,333.76/481,282.78
  6. Step 6: Final answer
    x = 386,610.67

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.