Home / 811,187.22-1,216,809.12-278,704.38

Finding the Fourth Proportional to 811,187.22, 1,216,809.12 and 278,704.38

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Solution

The fourth proportional to 811,187.22, 1,216,809.12 and 278,704.38 is: 418,066.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,187.22 : 1,216,809.12 = 278,704.38 : x
  2. Step 2: Convert to fraction form
    811,187.22/1,216,809.12 = 278,704.38/x
  3. Step 3: Cross multiply
    811,187.22x = 1,216,809.12 × 278,704.38
  4. Step 4: Simplify right side
    811,187.22x = 339,130,031,367.95
  5. Step 5: Solve for x
    x = 339,130,031,367.95/811,187.22
  6. Step 6: Final answer
    x = 418,066.29

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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.