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Finding the Fourth Proportional to 255.65, 382.80 and 152.45

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Solution

The fourth proportional to 255.65, 382.80 and 152.45 is: 228.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    255.65 : 382.80 = 152.45 : x
  2. Step 2: Convert to fraction form
    255.65/382.80 = 152.45/x
  3. Step 3: Cross multiply
    255.65x = 382.80 × 152.45
  4. Step 4: Simplify right side
    255.65x = 58,357.86
  5. Step 5: Solve for x
    x = 58,357.86/255.65
  6. Step 6: Final answer
    x = 228.27

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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.