Home / 1,328,390.20-1,990,544.10-989,842.60

Finding the Fourth Proportional to 1,328,390.20, 1,990,544.10 and 989,842.60

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Solution

The fourth proportional to 1,328,390.20, 1,990,544.10 and 989,842.60 is: 1,483,242.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,328,390.20 : 1,990,544.10 = 989,842.60 : x
  2. Step 2: Convert to fraction form
    1,328,390.20/1,990,544.10 = 989,842.60/x
  3. Step 3: Cross multiply
    1,328,390.20x = 1,990,544.10 × 989,842.60
  4. Step 4: Simplify right side
    1,328,390.20x = 1,970,325,347,358.66
  5. Step 5: Solve for x
    x = 1,970,325,347,358.66/1,328,390.20
  6. Step 6: Final answer
    x = 1,483,242.91

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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.