Home / 1,223,923.82-1,687,496.16-815,129.42

Finding the Fourth Proportional to 1,223,923.82, 1,687,496.16 and 815,129.42

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Solution

The fourth proportional to 1,223,923.82, 1,687,496.16 and 815,129.42 is: 1,123,867.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,223,923.82 : 1,687,496.16 = 815,129.42 : x
  2. Step 2: Convert to fraction form
    1,223,923.82/1,687,496.16 = 815,129.42/x
  3. Step 3: Cross multiply
    1,223,923.82x = 1,687,496.16 × 815,129.42
  4. Step 4: Simplify right side
    1,223,923.82x = 1,375,527,766,153.03
  5. Step 5: Solve for x
    x = 1,375,527,766,153.03/1,223,923.82
  6. Step 6: Final answer
    x = 1,123,867.14

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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.