Home / 1,556.40-2,145.33-1,224.30

Finding the Fourth Proportional to 1,556.40, 2,145.33 and 1,224.30

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Solution

The fourth proportional to 1,556.40, 2,145.33 and 1,224.30 is: 1,687.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,556.40 : 2,145.33 = 1,224.30 : x
  2. Step 2: Convert to fraction form
    1,556.40/2,145.33 = 1,224.30/x
  3. Step 3: Cross multiply
    1,556.40x = 2,145.33 × 1,224.30
  4. Step 4: Simplify right side
    1,556.40x = 2,626,527.52
  5. Step 5: Solve for x
    x = 2,626,527.52/1,556.40
  6. Step 6: Final answer
    x = 1,687.57

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1.5x scale

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.