Home / 3,121,990.60-4,682,985.90-878,128.60

Finding the Fourth Proportional to 3,121,990.60, 4,682,985.90 and 878,128.60

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Solution

The fourth proportional to 3,121,990.60, 4,682,985.90 and 878,128.60 is: 1,317,192.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,121,990.60 : 4,682,985.90 = 878,128.60 : x
  2. Step 2: Convert to fraction form
    3,121,990.60/4,682,985.90 = 878,128.60/x
  3. Step 3: Cross multiply
    3,121,990.60x = 4,682,985.90 × 878,128.60
  4. Step 4: Simplify right side
    3,121,990.60x = 4,112,263,852,186.74
  5. Step 5: Solve for x
    x = 4,112,263,852,186.74/3,121,990.60
  6. Step 6: Final answer
    x = 1,317,192.90

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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.