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Finding the Fourth Proportional to 1,603.10, 2,404.66 and 820.88

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Solution

The fourth proportional to 1,603.10, 2,404.66 and 820.88 is: 1,231.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,603.10 : 2,404.66 = 820.88 : x
  2. Step 2: Convert to fraction form
    1,603.10/2,404.66 = 820.88/x
  3. Step 3: Cross multiply
    1,603.10x = 2,404.66 × 820.88
  4. Step 4: Simplify right side
    1,603.10x = 1,973,937.30
  5. Step 5: Solve for x
    x = 1,973,937.30/1,603.10
  6. Step 6: Final answer
    x = 1,231.33

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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.