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Finding the Fourth Proportional to 645,809.56, 968,231.78 and 445,558.52

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Solution

The fourth proportional to 645,809.56, 968,231.78 and 445,558.52 is: 668,004.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,809.56 : 968,231.78 = 445,558.52 : x
  2. Step 2: Convert to fraction form
    645,809.56/968,231.78 = 445,558.52/x
  3. Step 3: Cross multiply
    645,809.56x = 968,231.78 × 445,558.52
  4. Step 4: Simplify right side
    645,809.56x = 431,403,920,777.40
  5. Step 5: Solve for x
    x = 431,403,920,777.40/645,809.56
  6. Step 6: Final answer
    x = 668,004.86

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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.