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Finding the Fourth Proportional to 815,908.60, 1,223,862.90 and 810,003.70

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Solution

The fourth proportional to 815,908.60, 1,223,862.90 and 810,003.70 is: 1,215,005.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    815,908.60 : 1,223,862.90 = 810,003.70 : x
  2. Step 2: Convert to fraction form
    815,908.60/1,223,862.90 = 810,003.70/x
  3. Step 3: Cross multiply
    815,908.60x = 1,223,862.90 × 810,003.70
  4. Step 4: Simplify right side
    815,908.60x = 991,333,477,292.73
  5. Step 5: Solve for x
    x = 991,333,477,292.73/815,908.60
  6. Step 6: Final answer
    x = 1,215,005.55

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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.