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Finding the Fourth Proportional to 1,409,362.80, 1,944,910.80 and 764,766.48

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Solution

The fourth proportional to 1,409,362.80, 1,944,910.80 and 764,766.48 is: 1,055,372.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,409,362.80 : 1,944,910.80 = 764,766.48 : x
  2. Step 2: Convert to fraction form
    1,409,362.80/1,944,910.80 = 764,766.48/x
  3. Step 3: Cross multiply
    1,409,362.80x = 1,944,910.80 × 764,766.48
  4. Step 4: Simplify right side
    1,409,362.80x = 1,487,402,586,429.98
  5. Step 5: Solve for x
    x = 1,487,402,586,429.98/1,409,362.80
  6. Step 6: Final answer
    x = 1,055,372.39

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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.