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Finding the Fourth Proportional to 396,508.51, 547,182.27 and 215,220.47

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Solution

The fourth proportional to 396,508.51, 547,182.27 and 215,220.47 is: 297,004.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,508.51 : 547,182.27 = 215,220.47 : x
  2. Step 2: Convert to fraction form
    396,508.51/547,182.27 = 215,220.47/x
  3. Step 3: Cross multiply
    396,508.51x = 547,182.27 × 215,220.47
  4. Step 4: Simplify right side
    396,508.51x = 117,764,825,325.07
  5. Step 5: Solve for x
    x = 117,764,825,325.07/396,508.51
  6. Step 6: Final answer
    x = 297,004.53

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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.