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Finding the Fourth Proportional to 438.79, 605.54 and 242.29

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Solution

The fourth proportional to 438.79, 605.54 and 242.29 is: 334.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    438.79 : 605.54 = 242.29 : x
  2. Step 2: Convert to fraction form
    438.79/605.54 = 242.29/x
  3. Step 3: Cross multiply
    438.79x = 605.54 × 242.29
  4. Step 4: Simplify right side
    438.79x = 146,712.05
  5. Step 5: Solve for x
    x = 146,712.05/438.79
  6. Step 6: Final answer
    x = 334.36

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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.