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Finding the Fourth Proportional to 445,376.40, 667,627.20 and 398,137.20

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Solution

The fourth proportional to 445,376.40, 667,627.20 and 398,137.20 is: 596,814.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,376.40 : 667,627.20 = 398,137.20 : x
  2. Step 2: Convert to fraction form
    445,376.40/667,627.20 = 398,137.20/x
  3. Step 3: Cross multiply
    445,376.40x = 667,627.20 × 398,137.20
  4. Step 4: Simplify right side
    445,376.40x = 265,807,224,051.84
  5. Step 5: Solve for x
    x = 265,807,224,051.84/445,376.40
  6. Step 6: Final answer
    x = 596,814.79

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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.