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Finding the Fourth Proportional to 255.04, 382.57 and 72.45

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Solution

The fourth proportional to 255.04, 382.57 and 72.45 is: 108.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    255.04 : 382.57 = 72.45 : x
  2. Step 2: Convert to fraction form
    255.04/382.57 = 72.45/x
  3. Step 3: Cross multiply
    255.04x = 382.57 × 72.45
  4. Step 4: Simplify right side
    255.04x = 27,717.02
  5. Step 5: Solve for x
    x = 27,717.02/255.04
  6. Step 6: Final answer
    x = 108.68

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.