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Finding the Fourth Proportional to 438.39, 604.26 and 307.17

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Solution

The fourth proportional to 438.39, 604.26 and 307.17 is: 423.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    438.39 : 604.26 = 307.17 : x
  2. Step 2: Convert to fraction form
    438.39/604.26 = 307.17/x
  3. Step 3: Cross multiply
    438.39x = 604.26 × 307.17
  4. Step 4: Simplify right side
    438.39x = 185,610.54
  5. Step 5: Solve for x
    x = 185,610.54/438.39
  6. Step 6: Final answer
    x = 423.39

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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.