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Finding the Fourth Proportional to 255.77, 383.70 and 93.45

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Solution

The fourth proportional to 255.77, 383.70 and 93.45 is: 140.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    255.77 : 383.70 = 93.45 : x
  2. Step 2: Convert to fraction form
    255.77/383.70 = 93.45/x
  3. Step 3: Cross multiply
    255.77x = 383.70 × 93.45
  4. Step 4: Simplify right side
    255.77x = 35,858.55
  5. Step 5: Solve for x
    x = 35,858.55/255.77
  6. Step 6: Final answer
    x = 140.20

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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.