Home / 815,156.14-1,222,977.21-389,011.90

Finding the Fourth Proportional to 815,156.14, 1,222,977.21 and 389,011.90

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Solution

The fourth proportional to 815,156.14, 1,222,977.21 and 389,011.90 is: 583,633.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    815,156.14 : 1,222,977.21 = 389,011.90 : x
  2. Step 2: Convert to fraction form
    815,156.14/1,222,977.21 = 389,011.90/x
  3. Step 3: Cross multiply
    815,156.14x = 1,222,977.21 × 389,011.90
  4. Step 4: Simplify right side
    815,156.14x = 475,752,688,118.80
  5. Step 5: Solve for x
    x = 475,752,688,118.80/815,156.14
  6. Step 6: Final answer
    x = 583,633.82

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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.