Home / 811,930.80-1,218,187.80-338,761.20

Finding the Fourth Proportional to 811,930.80, 1,218,187.80 and 338,761.20

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Solution

The fourth proportional to 811,930.80, 1,218,187.80 and 338,761.20 is: 508,263.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,930.80 : 1,218,187.80 = 338,761.20 : x
  2. Step 2: Convert to fraction form
    811,930.80/1,218,187.80 = 338,761.20/x
  3. Step 3: Cross multiply
    811,930.80x = 1,218,187.80 × 338,761.20
  4. Step 4: Simplify right side
    811,930.80x = 412,674,760,953.36
  5. Step 5: Solve for x
    x = 412,674,760,953.36/811,930.80
  6. Step 6: Final answer
    x = 508,263.46

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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.