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Finding the Fourth Proportional to 442.43, 663.50 and 259.91

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Solution

The fourth proportional to 442.43, 663.50 and 259.91 is: 389.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    442.43 : 663.50 = 259.91 : x
  2. Step 2: Convert to fraction form
    442.43/663.50 = 259.91/x
  3. Step 3: Cross multiply
    442.43x = 663.50 × 259.91
  4. Step 4: Simplify right side
    442.43x = 172,445.67
  5. Step 5: Solve for x
    x = 172,445.67/442.43
  6. Step 6: Final answer
    x = 389.77

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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.