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Finding the Fourth Proportional to 339,962.20, 510,016.20 and 103,328.80

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Solution

The fourth proportional to 339,962.20, 510,016.20 and 103,328.80 is: 155,015.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,962.20 : 510,016.20 = 103,328.80 : x
  2. Step 2: Convert to fraction form
    339,962.20/510,016.20 = 103,328.80/x
  3. Step 3: Cross multiply
    339,962.20x = 510,016.20 × 103,328.80
  4. Step 4: Simplify right side
    339,962.20x = 52,699,361,926.56
  5. Step 5: Solve for x
    x = 52,699,361,926.56/339,962.20
  6. Step 6: Final answer
    x = 155,015.36

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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.