Home / 1,182.90-1,783.21-1,103.61

Finding the Fourth Proportional to 1,182.90, 1,783.21 and 1,103.61

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Solution

The fourth proportional to 1,182.90, 1,783.21 and 1,103.61 is: 1,663.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,182.90 : 1,783.21 = 1,103.61 : x
  2. Step 2: Convert to fraction form
    1,182.90/1,783.21 = 1,103.61/x
  3. Step 3: Cross multiply
    1,182.90x = 1,783.21 × 1,103.61
  4. Step 4: Simplify right side
    1,182.90x = 1,967,968.39
  5. Step 5: Solve for x
    x = 1,967,968.39/1,182.90
  6. Step 6: Final answer
    x = 1,663.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.