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Finding the Fourth Proportional to 309,042.56, 426,458.44 and 173,045.34

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Solution

The fourth proportional to 309,042.56, 426,458.44 and 173,045.34 is: 238,791.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,042.56 : 426,458.44 = 173,045.34 : x
  2. Step 2: Convert to fraction form
    309,042.56/426,458.44 = 173,045.34/x
  3. Step 3: Cross multiply
    309,042.56x = 426,458.44 × 173,045.34
  4. Step 4: Simplify right side
    309,042.56x = 73,796,645,745.67
  5. Step 5: Solve for x
    x = 73,796,645,745.67/309,042.56
  6. Step 6: Final answer
    x = 238,791.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.