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Finding the Fourth Proportional to 1,105.69, 1,658.54 and 455.71

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Solution

The fourth proportional to 1,105.69, 1,658.54 and 455.71 is: 683.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,105.69 : 1,658.54 = 455.71 : x
  2. Step 2: Convert to fraction form
    1,105.69/1,658.54 = 455.71/x
  3. Step 3: Cross multiply
    1,105.69x = 1,658.54 × 455.71
  4. Step 4: Simplify right side
    1,105.69x = 755,810.98
  5. Step 5: Solve for x
    x = 755,810.98/1,105.69
  6. Step 6: Final answer
    x = 683.57

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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.