Home / 1,320,286.55-1,980,429.84-720,920.75

Finding the Fourth Proportional to 1,320,286.55, 1,980,429.84 and 720,920.75

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Solution

The fourth proportional to 1,320,286.55, 1,980,429.84 and 720,920.75 is: 1,081,381.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,320,286.55 : 1,980,429.84 = 720,920.75 : x
  2. Step 2: Convert to fraction form
    1,320,286.55/1,980,429.84 = 720,920.75/x
  3. Step 3: Cross multiply
    1,320,286.55x = 1,980,429.84 × 720,920.75
  4. Step 4: Simplify right side
    1,320,286.55x = 1,427,732,955,673.03
  5. Step 5: Solve for x
    x = 1,427,732,955,673.03/1,320,286.55
  6. Step 6: Final answer
    x = 1,081,381.13

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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.