Home / 1,128,085.28-1,691,286.35-678,700.85

Finding the Fourth Proportional to 1,128,085.28, 1,691,286.35 and 678,700.85

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Solution

The fourth proportional to 1,128,085.28, 1,691,286.35 and 678,700.85 is: 1,017,544.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,128,085.28 : 1,691,286.35 = 678,700.85 : x
  2. Step 2: Convert to fraction form
    1,128,085.28/1,691,286.35 = 678,700.85/x
  3. Step 3: Cross multiply
    1,128,085.28x = 1,691,286.35 × 678,700.85
  4. Step 4: Simplify right side
    1,128,085.28x = 1,147,877,483,338.40
  5. Step 5: Solve for x
    x = 1,147,877,483,338.40/1,128,085.28
  6. Step 6: Final answer
    x = 1,017,544.96

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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.