Home / 1,221.30-1,834.12-946.56

Finding the Fourth Proportional to 1,221.30, 1,834.12 and 946.56

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Solution

The fourth proportional to 1,221.30, 1,834.12 and 946.56 is: 1,421.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,221.30 : 1,834.12 = 946.56 : x
  2. Step 2: Convert to fraction form
    1,221.30/1,834.12 = 946.56/x
  3. Step 3: Cross multiply
    1,221.30x = 1,834.12 × 946.56
  4. Step 4: Simplify right side
    1,221.30x = 1,736,104.87
  5. Step 5: Solve for x
    x = 1,736,104.87/1,221.30
  6. Step 6: Final answer
    x = 1,421.52

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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.