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Finding the Fourth Proportional to 426,993.98, 640,502.25 and 186,984.40

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Solution

The fourth proportional to 426,993.98, 640,502.25 and 186,984.40 is: 280,481.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,993.98 : 640,502.25 = 186,984.40 : x
  2. Step 2: Convert to fraction form
    426,993.98/640,502.25 = 186,984.40/x
  3. Step 3: Cross multiply
    426,993.98x = 640,502.25 × 186,984.40
  4. Step 4: Simplify right side
    426,993.98x = 119,763,928,076.34
  5. Step 5: Solve for x
    x = 119,763,928,076.34/426,993.98
  6. Step 6: Final answer
    x = 280,481.54

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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.