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Finding the Fourth Proportional to 396,416.76, 547,509.60 and 261,056.04

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Solution

The fourth proportional to 396,416.76, 547,509.60 and 261,056.04 is: 360,556.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,416.76 : 547,509.60 = 261,056.04 : x
  2. Step 2: Convert to fraction form
    396,416.76/547,509.60 = 261,056.04/x
  3. Step 3: Cross multiply
    396,416.76x = 547,509.60 × 261,056.04
  4. Step 4: Simplify right side
    396,416.76x = 142,930,688,037.98
  5. Step 5: Solve for x
    x = 142,930,688,037.98/396,416.76
  6. Step 6: Final answer
    x = 360,556.62

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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.