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Finding the Fourth Proportional to 1,139.98, 1,573.96 and 873.96

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Solution

The fourth proportional to 1,139.98, 1,573.96 and 873.96 is: 1,206.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,139.98 : 1,573.96 = 873.96 : x
  2. Step 2: Convert to fraction form
    1,139.98/1,573.96 = 873.96/x
  3. Step 3: Cross multiply
    1,139.98x = 1,573.96 × 873.96
  4. Step 4: Simplify right side
    1,139.98x = 1,375,578.08
  5. Step 5: Solve for x
    x = 1,375,578.08/1,139.98
  6. Step 6: Final answer
    x = 1,206.67

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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.