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Finding the Fourth Proportional to 445,322.56, 667,841.28 and 145,721.92

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Solution

The fourth proportional to 445,322.56, 667,841.28 and 145,721.92 is: 218,536.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,322.56 : 667,841.28 = 145,721.92 : x
  2. Step 2: Convert to fraction form
    445,322.56/667,841.28 = 145,721.92/x
  3. Step 3: Cross multiply
    445,322.56x = 667,841.28 × 145,721.92
  4. Step 4: Simplify right side
    445,322.56x = 97,319,113,576.86
  5. Step 5: Solve for x
    x = 97,319,113,576.86/445,322.56
  6. Step 6: Final answer
    x = 218,536.23

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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.