Home / 1,225,406.40-1,689,186.60-861,839.52

Finding the Fourth Proportional to 1,225,406.40, 1,689,186.60 and 861,839.52

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Solution

The fourth proportional to 1,225,406.40, 1,689,186.60 and 861,839.52 is: 1,188,020.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,225,406.40 : 1,689,186.60 = 861,839.52 : x
  2. Step 2: Convert to fraction form
    1,225,406.40/1,689,186.60 = 861,839.52/x
  3. Step 3: Cross multiply
    1,225,406.40x = 1,689,186.60 × 861,839.52
  4. Step 4: Simplify right side
    1,225,406.40x = 1,455,807,768,534.43
  5. Step 5: Solve for x
    x = 1,455,807,768,534.43/1,225,406.40
  6. Step 6: Final answer
    x = 1,188,020.37

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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.