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Finding the Fourth Proportional to 442.60, 663.92 and 260.08

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Solution

The fourth proportional to 442.60, 663.92 and 260.08 is: 390.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    442.60 : 663.92 = 260.08 : x
  2. Step 2: Convert to fraction form
    442.60/663.92 = 260.08/x
  3. Step 3: Cross multiply
    442.60x = 663.92 × 260.08
  4. Step 4: Simplify right side
    442.60x = 172,672.31
  5. Step 5: Solve for x
    x = 172,672.31/442.60
  6. Step 6: Final answer
    x = 390.13

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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.