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Finding the Fourth Proportional to 445,521.33, 668,405.43 and 205,708.50

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Solution

The fourth proportional to 445,521.33, 668,405.43 and 205,708.50 is: 308,619.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,521.33 : 668,405.43 = 205,708.50 : x
  2. Step 2: Convert to fraction form
    445,521.33/668,405.43 = 205,708.50/x
  3. Step 3: Cross multiply
    445,521.33x = 668,405.43 × 205,708.50
  4. Step 4: Simplify right side
    445,521.33x = 137,496,678,397.16
  5. Step 5: Solve for x
    x = 137,496,678,397.16/445,521.33
  6. Step 6: Final answer
    x = 308,619.74

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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.