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Finding the Fourth Proportional to 396,501.40, 547,172.40 and 215,213.32

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Solution

The fourth proportional to 396,501.40, 547,172.40 and 215,213.32 is: 296,994.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,501.40 : 547,172.40 = 215,213.32 : x
  2. Step 2: Convert to fraction form
    396,501.40/547,172.40 = 215,213.32/x
  3. Step 3: Cross multiply
    396,501.40x = 547,172.40 × 215,213.32
  4. Step 4: Simplify right side
    396,501.40x = 117,758,788,816.37
  5. Step 5: Solve for x
    x = 117,758,788,816.37/396,501.40
  6. Step 6: Final answer
    x = 296,994.64

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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.