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Finding the Fourth Proportional to 633.68, 873.61 and 423.89

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Solution

The fourth proportional to 633.68, 873.61 and 423.89 is: 584.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    633.68 : 873.61 = 423.89 : x
  2. Step 2: Convert to fraction form
    633.68/873.61 = 423.89/x
  3. Step 3: Cross multiply
    633.68x = 873.61 × 423.89
  4. Step 4: Simplify right side
    633.68x = 370,314.54
  5. Step 5: Solve for x
    x = 370,314.54/633.68
  6. Step 6: Final answer
    x = 584.39

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.