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Finding the Fourth Proportional to 1,103.12, 1,654.64 and 372.63

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Solution

The fourth proportional to 1,103.12, 1,654.64 and 372.63 is: 558.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,103.12 : 1,654.64 = 372.63 : x
  2. Step 2: Convert to fraction form
    1,103.12/1,654.64 = 372.63/x
  3. Step 3: Cross multiply
    1,103.12x = 1,654.64 × 372.63
  4. Step 4: Simplify right side
    1,103.12x = 616,576.34
  5. Step 5: Solve for x
    x = 616,576.34/1,103.12
  6. Step 6: Final answer
    x = 558.94

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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.