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Finding the Fourth Proportional to 438.60, 604.74 and 291.24

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Solution

The fourth proportional to 438.60, 604.74 and 291.24 is: 401.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    438.60 : 604.74 = 291.24 : x
  2. Step 2: Convert to fraction form
    438.60/604.74 = 291.24/x
  3. Step 3: Cross multiply
    438.60x = 604.74 × 291.24
  4. Step 4: Simplify right side
    438.60x = 176,124.48
  5. Step 5: Solve for x
    x = 176,124.48/438.60
  6. Step 6: Final answer
    x = 401.56

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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.