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Finding the Fourth Proportional to 333.60, 498.21 and 279.54

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Solution

The fourth proportional to 333.60, 498.21 and 279.54 is: 417.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    333.60 : 498.21 = 279.54 : x
  2. Step 2: Convert to fraction form
    333.60/498.21 = 279.54/x
  3. Step 3: Cross multiply
    333.60x = 498.21 × 279.54
  4. Step 4: Simplify right side
    333.60x = 139,269.62
  5. Step 5: Solve for x
    x = 139,269.62/333.60
  6. Step 6: Final answer
    x = 417.47

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.