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Finding the Fourth Proportional to 438.92, 604.08 and 403.96

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Solution

The fourth proportional to 438.92, 604.08 and 403.96 is: 555.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    438.92 : 604.08 = 403.96 : x
  2. Step 2: Convert to fraction form
    438.92/604.08 = 403.96/x
  3. Step 3: Cross multiply
    438.92x = 604.08 × 403.96
  4. Step 4: Simplify right side
    438.92x = 244,024.16
  5. Step 5: Solve for x
    x = 244,024.16/438.92
  6. Step 6: Final answer
    x = 555.96

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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.