Home / 815,635.79-1,221,591.04-389,471.60

Finding the Fourth Proportional to 815,635.79, 1,221,591.04 and 389,471.60

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Solution

The fourth proportional to 815,635.79, 1,221,591.04 and 389,471.60 is: 583,317.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    815,635.79 : 1,221,591.04 = 389,471.60 : x
  2. Step 2: Convert to fraction form
    815,635.79/1,221,591.04 = 389,471.60/x
  3. Step 3: Cross multiply
    815,635.79x = 1,221,591.04 × 389,471.60
  4. Step 4: Simplify right side
    815,635.79x = 475,775,018,974.76
  5. Step 5: Solve for x
    x = 475,775,018,974.76/815,635.79
  6. Step 6: Final answer
    x = 583,317.98

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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.