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Finding the Fourth Proportional to 883.24, 1,324.86 and 420.59

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Solution

The fourth proportional to 883.24, 1,324.86 and 420.59 is: 630.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    883.24 : 1,324.86 = 420.59 : x
  2. Step 2: Convert to fraction form
    883.24/1,324.86 = 420.59/x
  3. Step 3: Cross multiply
    883.24x = 1,324.86 × 420.59
  4. Step 4: Simplify right side
    883.24x = 557,224.60
  5. Step 5: Solve for x
    x = 557,224.60/883.24
  6. Step 6: Final answer
    x = 630.89

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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.