Home / 1,455.21-2,181.77-868.82

Finding the Fourth Proportional to 1,455.21, 2,181.77 and 868.82

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Solution

The fourth proportional to 1,455.21, 2,181.77 and 868.82 is: 1,302.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,455.21 : 2,181.77 = 868.82 : x
  2. Step 2: Convert to fraction form
    1,455.21/2,181.77 = 868.82/x
  3. Step 3: Cross multiply
    1,455.21x = 2,181.77 × 868.82
  4. Step 4: Simplify right side
    1,455.21x = 1,895,553.42
  5. Step 5: Solve for x
    x = 1,895,553.42/1,455.21
  6. Step 6: Final answer
    x = 1,302.60

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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.