Home / 1,780.64-2,668.92-1,113.84

Finding the Fourth Proportional to 1,780.64, 2,668.92 and 1,113.84

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Solution

The fourth proportional to 1,780.64, 2,668.92 and 1,113.84 is: 1,669.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,780.64 : 2,668.92 = 1,113.84 : x
  2. Step 2: Convert to fraction form
    1,780.64/2,668.92 = 1,113.84/x
  3. Step 3: Cross multiply
    1,780.64x = 2,668.92 × 1,113.84
  4. Step 4: Simplify right side
    1,780.64x = 2,972,749.85
  5. Step 5: Solve for x
    x = 2,972,749.85/1,780.64
  6. Step 6: Final answer
    x = 1,669.49

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1.5x scale

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.