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Finding the Fourth Proportional to 396,441.64, 547,543.53 and 261,080.65

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Solution

The fourth proportional to 396,441.64, 547,543.53 and 261,080.65 is: 360,590.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,441.64 : 547,543.53 = 261,080.65 : x
  2. Step 2: Convert to fraction form
    396,441.64/547,543.53 = 261,080.65/x
  3. Step 3: Cross multiply
    396,441.64x = 547,543.53 × 261,080.65
  4. Step 4: Simplify right side
    396,441.64x = 142,953,020,715.70
  5. Step 5: Solve for x
    x = 142,953,020,715.70/396,441.64
  6. Step 6: Final answer
    x = 360,590.33

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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.