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Finding the Fourth Proportional to 396,663.51, 547,405.16 and 215,383.08

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Solution

The fourth proportional to 396,663.51, 547,405.16 and 215,383.08 is: 297,233.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,663.51 : 547,405.16 = 215,383.08 : x
  2. Step 2: Convert to fraction form
    396,663.51/547,405.16 = 215,383.08/x
  3. Step 3: Cross multiply
    396,663.51x = 547,405.16 × 215,383.08
  4. Step 4: Simplify right side
    396,663.51x = 117,901,805,725.82
  5. Step 5: Solve for x
    x = 117,901,805,725.82/396,663.51
  6. Step 6: Final answer
    x = 297,233.81

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1.5x scale

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.