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Finding the Fourth Proportional to 339,430.21, 508,370.29 and 162,061.78

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Solution

The fourth proportional to 339,430.21, 508,370.29 and 162,061.78 is: 242,722.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,430.21 : 508,370.29 = 162,061.78 : x
  2. Step 2: Convert to fraction form
    339,430.21/508,370.29 = 162,061.78/x
  3. Step 3: Cross multiply
    339,430.21x = 508,370.29 × 162,061.78
  4. Step 4: Simplify right side
    339,430.21x = 82,387,394,096.52
  5. Step 5: Solve for x
    x = 82,387,394,096.52/339,430.21
  6. Step 6: Final answer
    x = 242,722.63

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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.