Home / 1,556.52-2,149.20-1,221.54

Finding the Fourth Proportional to 1,556.52, 2,149.20 and 1,221.54

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Solution

The fourth proportional to 1,556.52, 2,149.20 and 1,221.54 is: 1,686.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,556.52 : 2,149.20 = 1,221.54 : x
  2. Step 2: Convert to fraction form
    1,556.52/2,149.20 = 1,221.54/x
  3. Step 3: Cross multiply
    1,556.52x = 2,149.20 × 1,221.54
  4. Step 4: Simplify right side
    1,556.52x = 2,625,333.77
  5. Step 5: Solve for x
    x = 2,625,333.77/1,556.52
  6. Step 6: Final answer
    x = 1,686.67

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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.