Home / 1,221.36-1,823.18-1,135.91

Finding the Fourth Proportional to 1,221.36, 1,823.18 and 1,135.91

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Solution

The fourth proportional to 1,221.36, 1,823.18 and 1,135.91 is: 1,695.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,221.36 : 1,823.18 = 1,135.91 : x
  2. Step 2: Convert to fraction form
    1,221.36/1,823.18 = 1,135.91/x
  3. Step 3: Cross multiply
    1,221.36x = 1,823.18 × 1,135.91
  4. Step 4: Simplify right side
    1,221.36x = 2,070,968.39
  5. Step 5: Solve for x
    x = 2,070,968.39/1,221.36
  6. Step 6: Final answer
    x = 1,695.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.