Home / 1,253.30-1,869.74-1,221.08

Finding the Fourth Proportional to 1,253.30, 1,869.74 and 1,221.08

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Solution

The fourth proportional to 1,253.30, 1,869.74 and 1,221.08 is: 1,821.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,253.30 : 1,869.74 = 1,221.08 : x
  2. Step 2: Convert to fraction form
    1,253.30/1,869.74 = 1,221.08/x
  3. Step 3: Cross multiply
    1,253.30x = 1,869.74 × 1,221.08
  4. Step 4: Simplify right side
    1,253.30x = 2,283,091.24
  5. Step 5: Solve for x
    x = 2,283,091.24/1,253.30
  6. Step 6: Final answer
    x = 1,821.67

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.