Home / 1,311,405.12-1,809,938.88-945,097.20

Finding the Fourth Proportional to 1,311,405.12, 1,809,938.88 and 945,097.20

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Solution

The fourth proportional to 1,311,405.12, 1,809,938.88 and 945,097.20 is: 1,304,378.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,311,405.12 : 1,809,938.88 = 945,097.20 : x
  2. Step 2: Convert to fraction form
    1,311,405.12/1,809,938.88 = 945,097.20/x
  3. Step 3: Cross multiply
    1,311,405.12x = 1,809,938.88 × 945,097.20
  4. Step 4: Simplify right side
    1,311,405.12x = 1,710,568,167,659.14
  5. Step 5: Solve for x
    x = 1,710,568,167,659.14/1,311,405.12
  6. Step 6: Final answer
    x = 1,304,378.14

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.