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Finding the Fourth Proportional to 339,144.80, 508,717.20 and 319,791.20

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Solution

The fourth proportional to 339,144.80, 508,717.20 and 319,791.20 is: 479,686.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,144.80 : 508,717.20 = 319,791.20 : x
  2. Step 2: Convert to fraction form
    339,144.80/508,717.20 = 319,791.20/x
  3. Step 3: Cross multiply
    339,144.80x = 508,717.20 × 319,791.20
  4. Step 4: Simplify right side
    339,144.80x = 162,683,283,848.64
  5. Step 5: Solve for x
    x = 162,683,283,848.64/339,144.80
  6. Step 6: Final answer
    x = 479,686.80

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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.