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Finding the Fourth Proportional to 307,699.44, 424,624.06 and 171,731.90

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Solution

The fourth proportional to 307,699.44, 424,624.06 and 171,731.90 is: 236,989.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,699.44 : 424,624.06 = 171,731.90 : x
  2. Step 2: Convert to fraction form
    307,699.44/424,624.06 = 171,731.90/x
  3. Step 3: Cross multiply
    307,699.44x = 424,624.06 × 171,731.90
  4. Step 4: Simplify right side
    307,699.44x = 72,921,496,609.51
  5. Step 5: Solve for x
    x = 72,921,496,609.51/307,699.44
  6. Step 6: Final answer
    x = 236,989.37

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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.