Home / 1,222.13-1,686.85-1,090.91

Finding the Fourth Proportional to 1,222.13, 1,686.85 and 1,090.91

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Solution

The fourth proportional to 1,222.13, 1,686.85 and 1,090.91 is: 1,505.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,222.13 : 1,686.85 = 1,090.91 : x
  2. Step 2: Convert to fraction form
    1,222.13/1,686.85 = 1,090.91/x
  3. Step 3: Cross multiply
    1,222.13x = 1,686.85 × 1,090.91
  4. Step 4: Simplify right side
    1,222.13x = 1,840,203.02
  5. Step 5: Solve for x
    x = 1,840,203.02/1,222.13
  6. Step 6: Final answer
    x = 1,505.73

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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.