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Finding the Fourth Proportional to 1,331,799.79, 1,837,890.80 and 728,187.79

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Solution

The fourth proportional to 1,331,799.79, 1,837,890.80 and 728,187.79 is: 1,004,903.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,331,799.79 : 1,837,890.80 = 728,187.79 : x
  2. Step 2: Convert to fraction form
    1,331,799.79/1,837,890.80 = 728,187.79/x
  3. Step 3: Cross multiply
    1,331,799.79x = 1,837,890.80 × 728,187.79
  4. Step 4: Simplify right side
    1,331,799.79x = 1,338,329,639,913.33
  5. Step 5: Solve for x
    x = 1,338,329,639,913.33/1,331,799.79
  6. Step 6: Final answer
    x = 1,004,903.03

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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.