Home / 1,012,980.31-1,520,540.87-990,109.15

Finding the Fourth Proportional to 1,012,980.31, 1,520,540.87 and 990,109.15

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Solution

The fourth proportional to 1,012,980.31, 1,520,540.87 and 990,109.15 is: 1,486,209.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,012,980.31 : 1,520,540.87 = 990,109.15 : x
  2. Step 2: Convert to fraction form
    1,012,980.31/1,520,540.87 = 990,109.15/x
  3. Step 3: Cross multiply
    1,012,980.31x = 1,520,540.87 × 990,109.15
  4. Step 4: Simplify right side
    1,012,980.31x = 1,505,501,428,335.96
  5. Step 5: Solve for x
    x = 1,505,501,428,335.96/1,012,980.31
  6. Step 6: Final answer
    x = 1,486,209.96

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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.