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Finding the Fourth Proportional to 396,126.56, 594,068.40 and 143,376.80

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Solution

The fourth proportional to 396,126.56, 594,068.40 and 143,376.80 is: 215,021.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,126.56 : 594,068.40 = 143,376.80 : x
  2. Step 2: Convert to fraction form
    396,126.56/594,068.40 = 143,376.80/x
  3. Step 3: Cross multiply
    396,126.56x = 594,068.40 × 143,376.80
  4. Step 4: Simplify right side
    396,126.56x = 85,175,626,173.12
  5. Step 5: Solve for x
    x = 85,175,626,173.12/396,126.56
  6. Step 6: Final answer
    x = 215,021.25

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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.