Home / 1,259,486.80-1,889,813.40-661,123.60

Finding the Fourth Proportional to 1,259,486.80, 1,889,813.40 and 661,123.60

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Solution

The fourth proportional to 1,259,486.80, 1,889,813.40 and 661,123.60 is: 991,991.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,259,486.80 : 1,889,813.40 = 661,123.60 : x
  2. Step 2: Convert to fraction form
    1,259,486.80/1,889,813.40 = 661,123.60/x
  3. Step 3: Cross multiply
    1,259,486.80x = 1,889,813.40 × 661,123.60
  4. Step 4: Simplify right side
    1,259,486.80x = 1,249,400,238,336.24
  5. Step 5: Solve for x
    x = 1,249,400,238,336.24/1,259,486.80
  6. Step 6: Final answer
    x = 991,991.53

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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.