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Finding the Fourth Proportional to 255.80, 383.59 and 73.15

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Solution

The fourth proportional to 255.80, 383.59 and 73.15 is: 109.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    255.80 : 383.59 = 73.15 : x
  2. Step 2: Convert to fraction form
    255.80/383.59 = 73.15/x
  3. Step 3: Cross multiply
    255.80x = 383.59 × 73.15
  4. Step 4: Simplify right side
    255.80x = 28,060.20
  5. Step 5: Solve for x
    x = 28,060.20/255.80
  6. Step 6: Final answer
    x = 109.70

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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.