Home / 1,211,788.80-1,672,392.96-728,511.36

Finding the Fourth Proportional to 1,211,788.80, 1,672,392.96 and 728,511.36

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Solution

The fourth proportional to 1,211,788.80, 1,672,392.96 and 728,511.36 is: 1,005,420.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,211,788.80 : 1,672,392.96 = 728,511.36 : x
  2. Step 2: Convert to fraction form
    1,211,788.80/1,672,392.96 = 728,511.36/x
  3. Step 3: Cross multiply
    1,211,788.80x = 1,672,392.96 × 728,511.36
  4. Step 4: Simplify right side
    1,211,788.80x = 1,218,357,269,744.03
  5. Step 5: Solve for x
    x = 1,218,357,269,744.03/1,211,788.80
  6. Step 6: Final answer
    x = 1,005,420.47

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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.