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Finding the Fourth Proportional to 438.44, 604.64 and 307.20

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Solution

The fourth proportional to 438.44, 604.64 and 307.20 is: 423.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    438.44 : 604.64 = 307.20 : x
  2. Step 2: Convert to fraction form
    438.44/604.64 = 307.20/x
  3. Step 3: Cross multiply
    438.44x = 604.64 × 307.20
  4. Step 4: Simplify right side
    438.44x = 185,745.41
  5. Step 5: Solve for x
    x = 185,745.41/438.44
  6. Step 6: Final answer
    x = 423.65

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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.