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Finding the Fourth Proportional to 445,574.56, 668,425.52 and 145,991.20

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Solution

The fourth proportional to 445,574.56, 668,425.52 and 145,991.20 is: 219,007.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,574.56 : 668,425.52 = 145,991.20 : x
  2. Step 2: Convert to fraction form
    445,574.56/668,425.52 = 145,991.20/x
  3. Step 3: Cross multiply
    445,574.56x = 668,425.52 × 145,991.20
  4. Step 4: Simplify right side
    445,574.56x = 97,584,243,775.42
  5. Step 5: Solve for x
    x = 97,584,243,775.42/445,574.56
  6. Step 6: Final answer
    x = 219,007.66

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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.