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Finding the Fourth Proportional to 384.87, 531.17 and 352.07

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Solution

The fourth proportional to 384.87, 531.17 and 352.07 is: 485.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    384.87 : 531.17 = 352.07 : x
  2. Step 2: Convert to fraction form
    384.87/531.17 = 352.07/x
  3. Step 3: Cross multiply
    384.87x = 531.17 × 352.07
  4. Step 4: Simplify right side
    384.87x = 187,009.90
  5. Step 5: Solve for x
    x = 187,009.90/384.87
  6. Step 6: Final answer
    x = 485.90

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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.