Home / 1,388.27-2,090.61-1,207.85

Finding the Fourth Proportional to 1,388.27, 2,090.61 and 1,207.85

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Solution

The fourth proportional to 1,388.27, 2,090.61 and 1,207.85 is: 1,818.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,388.27 : 2,090.61 = 1,207.85 : x
  2. Step 2: Convert to fraction form
    1,388.27/2,090.61 = 1,207.85/x
  3. Step 3: Cross multiply
    1,388.27x = 2,090.61 × 1,207.85
  4. Step 4: Simplify right side
    1,388.27x = 2,525,132.84
  5. Step 5: Solve for x
    x = 2,525,132.84/1,388.27
  6. Step 6: Final answer
    x = 1,818.90

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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.