Home / 1,209.30-1,669.23-1,103.58

Finding the Fourth Proportional to 1,209.30, 1,669.23 and 1,103.58

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Solution

The fourth proportional to 1,209.30, 1,669.23 and 1,103.58 is: 1,523.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,209.30 : 1,669.23 = 1,103.58 : x
  2. Step 2: Convert to fraction form
    1,209.30/1,669.23 = 1,103.58/x
  3. Step 3: Cross multiply
    1,209.30x = 1,669.23 × 1,103.58
  4. Step 4: Simplify right side
    1,209.30x = 1,842,128.84
  5. Step 5: Solve for x
    x = 1,842,128.84/1,209.30
  6. Step 6: Final answer
    x = 1,523.30

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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.