Home / 1,399,228.63-1,930,912.88-787,381.03

Finding the Fourth Proportional to 1,399,228.63, 1,930,912.88 and 787,381.03

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Solution

The fourth proportional to 1,399,228.63, 1,930,912.88 and 787,381.03 is: 1,086,573.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,399,228.63 : 1,930,912.88 = 787,381.03 : x
  2. Step 2: Convert to fraction form
    1,399,228.63/1,930,912.88 = 787,381.03/x
  3. Step 3: Cross multiply
    1,399,228.63x = 1,930,912.88 × 787,381.03
  4. Step 4: Simplify right side
    1,399,228.63x = 1,520,364,170,771.40
  5. Step 5: Solve for x
    x = 1,520,364,170,771.40/1,399,228.63
  6. Step 6: Final answer
    x = 1,086,573.09

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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.