Home / 1,291,245.40-1,936,868.10-787,360.60

Finding the Fourth Proportional to 1,291,245.40, 1,936,868.10 and 787,360.60

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Solution

The fourth proportional to 1,291,245.40, 1,936,868.10 and 787,360.60 is: 1,181,040.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,291,245.40 : 1,936,868.10 = 787,360.60 : x
  2. Step 2: Convert to fraction form
    1,291,245.40/1,936,868.10 = 787,360.60/x
  3. Step 3: Cross multiply
    1,291,245.40x = 1,936,868.10 × 787,360.60
  4. Step 4: Simplify right side
    1,291,245.40x = 1,525,013,629,336.86
  5. Step 5: Solve for x
    x = 1,525,013,629,336.86/1,291,245.40
  6. Step 6: Final answer
    x = 1,181,040.90

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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.