Home / 1,298,786.78-1,938,669.20-1,145,391.68

Finding the Fourth Proportional to 1,298,786.78, 1,938,669.20 and 1,145,391.68

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Solution

The fourth proportional to 1,298,786.78, 1,938,669.20 and 1,145,391.68 is: 1,709,699.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,298,786.78 : 1,938,669.20 = 1,145,391.68 : x
  2. Step 2: Convert to fraction form
    1,298,786.78/1,938,669.20 = 1,145,391.68/x
  3. Step 3: Cross multiply
    1,298,786.78x = 1,938,669.20 × 1,145,391.68
  4. Step 4: Simplify right side
    1,298,786.78x = 2,220,535,571,952.26
  5. Step 5: Solve for x
    x = 2,220,535,571,952.26/1,298,786.78
  6. Step 6: Final answer
    x = 1,709,699.86

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.