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Finding the Fourth Proportional to 396,395.76, 547,023.42 and 215,103.12

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Solution

The fourth proportional to 396,395.76, 547,023.42 and 215,103.12 is: 296,840.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,395.76 : 547,023.42 = 215,103.12 : x
  2. Step 2: Convert to fraction form
    396,395.76/547,023.42 = 215,103.12/x
  3. Step 3: Cross multiply
    396,395.76x = 547,023.42 × 215,103.12
  4. Step 4: Simplify right side
    396,395.76x = 117,666,444,355.07
  5. Step 5: Solve for x
    x = 117,666,444,355.07/396,395.76
  6. Step 6: Final answer
    x = 296,840.82

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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.