Home / 871,790.40-1,307,685.60-820,180.80

Finding the Fourth Proportional to 871,790.40, 1,307,685.60 and 820,180.80

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Solution

The fourth proportional to 871,790.40, 1,307,685.60 and 820,180.80 is: 1,230,271.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    871,790.40 : 1,307,685.60 = 820,180.80 : x
  2. Step 2: Convert to fraction form
    871,790.40/1,307,685.60 = 820,180.80/x
  3. Step 3: Cross multiply
    871,790.40x = 1,307,685.60 × 820,180.80
  4. Step 4: Simplify right side
    871,790.40x = 1,072,538,621,556.48
  5. Step 5: Solve for x
    x = 1,072,538,621,556.48/871,790.40
  6. Step 6: Final answer
    x = 1,230,271.20

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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.