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Finding the Fourth Proportional to 309,195.36, 426,734.70 and 173,238.54

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Solution

The fourth proportional to 309,195.36, 426,734.70 and 173,238.54 is: 239,094.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,195.36 : 426,734.70 = 173,238.54 : x
  2. Step 2: Convert to fraction form
    309,195.36/426,734.70 = 173,238.54/x
  3. Step 3: Cross multiply
    309,195.36x = 426,734.70 × 173,238.54
  4. Step 4: Simplify right side
    309,195.36x = 73,926,896,395.34
  5. Step 5: Solve for x
    x = 73,926,896,395.34/309,195.36
  6. Step 6: Final answer
    x = 239,094.46

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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.