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Finding the Fourth Proportional to 433.61, 648.82 and 260.39

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Solution

The fourth proportional to 433.61, 648.82 and 260.39 is: 389.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    433.61 : 648.82 = 260.39 : x
  2. Step 2: Convert to fraction form
    433.61/648.82 = 260.39/x
  3. Step 3: Cross multiply
    433.61x = 648.82 × 260.39
  4. Step 4: Simplify right side
    433.61x = 168,942.34
  5. Step 5: Solve for x
    x = 168,942.34/433.61
  6. Step 6: Final answer
    x = 389.62

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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.