Home / 811,157.72-1,216,819.20-278,609.72

Finding the Fourth Proportional to 811,157.72, 1,216,819.20 and 278,609.72

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Solution

The fourth proportional to 811,157.72, 1,216,819.20 and 278,609.72 is: 417,942.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,157.72 : 1,216,819.20 = 278,609.72 : x
  2. Step 2: Convert to fraction form
    811,157.72/1,216,819.20 = 278,609.72/x
  3. Step 3: Cross multiply
    811,157.72x = 1,216,819.20 × 278,609.72
  4. Step 4: Simplify right side
    811,157.72x = 339,017,656,602.62
  5. Step 5: Solve for x
    x = 339,017,656,602.62/811,157.72
  6. Step 6: Final answer
    x = 417,942.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.