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Finding the Fourth Proportional to 396,455.64, 547,109.16 and 215,167.70

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Solution

The fourth proportional to 396,455.64, 547,109.16 and 215,167.70 is: 296,931.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,455.64 : 547,109.16 = 215,167.70 : x
  2. Step 2: Convert to fraction form
    396,455.64/547,109.16 = 215,167.70/x
  3. Step 3: Cross multiply
    396,455.64x = 547,109.16 × 215,167.70
  4. Step 4: Simplify right side
    396,455.64x = 117,720,219,606.13
  5. Step 5: Solve for x
    x = 117,720,219,606.13/396,455.64
  6. Step 6: Final answer
    x = 296,931.63

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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.