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Finding the Fourth Proportional to 396,638.40, 547,367.58 and 215,350.32

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Solution

The fourth proportional to 396,638.40, 547,367.58 and 215,350.32 is: 297,187.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,638.40 : 547,367.58 = 215,350.32 : x
  2. Step 2: Convert to fraction form
    396,638.40/547,367.58 = 215,350.32/x
  3. Step 3: Cross multiply
    396,638.40x = 547,367.58 × 215,350.32
  4. Step 4: Simplify right side
    396,638.40x = 117,875,783,510.63
  5. Step 5: Solve for x
    x = 117,875,783,510.63/396,638.40
  6. Step 6: Final answer
    x = 297,187.02

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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.