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Finding the Fourth Proportional to 385.95, 531.22 and 349.03

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Solution

The fourth proportional to 385.95, 531.22 and 349.03 is: 480.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    385.95 : 531.22 = 349.03 : x
  2. Step 2: Convert to fraction form
    385.95/531.22 = 349.03/x
  3. Step 3: Cross multiply
    385.95x = 531.22 × 349.03
  4. Step 4: Simplify right side
    385.95x = 185,411.72
  5. Step 5: Solve for x
    x = 185,411.72/385.95
  6. Step 6: Final answer
    x = 480.40

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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.