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Finding the Fourth Proportional to 883.69, 1,324.52 and 420.81

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Solution

The fourth proportional to 883.69, 1,324.52 and 420.81 is: 630.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    883.69 : 1,324.52 = 420.81 : x
  2. Step 2: Convert to fraction form
    883.69/1,324.52 = 420.81/x
  3. Step 3: Cross multiply
    883.69x = 1,324.52 × 420.81
  4. Step 4: Simplify right side
    883.69x = 557,372.31
  5. Step 5: Solve for x
    x = 557,372.31/883.69
  6. Step 6: Final answer
    x = 630.73

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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.