Home / 1,871.80-2,582.55-1,209.04

Finding the Fourth Proportional to 1,871.80, 2,582.55 and 1,209.04

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Solution

The fourth proportional to 1,871.80, 2,582.55 and 1,209.04 is: 1,668.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,871.80 : 2,582.55 = 1,209.04 : x
  2. Step 2: Convert to fraction form
    1,871.80/2,582.55 = 1,209.04/x
  3. Step 3: Cross multiply
    1,871.80x = 2,582.55 × 1,209.04
  4. Step 4: Simplify right side
    1,871.80x = 3,122,399.80
  5. Step 5: Solve for x
    x = 3,122,399.80/1,871.80
  6. Step 6: Final answer
    x = 1,668.13

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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.