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Finding the Fourth Proportional to 1,105.61, 1,658.21 and 325.44

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Solution

The fourth proportional to 1,105.61, 1,658.21 and 325.44 is: 488.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,105.61 : 1,658.21 = 325.44 : x
  2. Step 2: Convert to fraction form
    1,105.61/1,658.21 = 325.44/x
  3. Step 3: Cross multiply
    1,105.61x = 1,658.21 × 325.44
  4. Step 4: Simplify right side
    1,105.61x = 539,647.86
  5. Step 5: Solve for x
    x = 539,647.86/1,105.61
  6. Step 6: Final answer
    x = 488.10

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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.