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Finding the Fourth Proportional to 1,221.55, 1,829.72 and 563.96

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Solution

The fourth proportional to 1,221.55, 1,829.72 and 563.96 is: 844.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,221.55 : 1,829.72 = 563.96 : x
  2. Step 2: Convert to fraction form
    1,221.55/1,829.72 = 563.96/x
  3. Step 3: Cross multiply
    1,221.55x = 1,829.72 × 563.96
  4. Step 4: Simplify right side
    1,221.55x = 1,031,894.88
  5. Step 5: Solve for x
    x = 1,031,894.88/1,221.55
  6. Step 6: Final answer
    x = 844.74

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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.