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Finding the Fourth Proportional to 260.83, 390.03 and 257.19

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Solution

The fourth proportional to 260.83, 390.03 and 257.19 is: 384.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    260.83 : 390.03 = 257.19 : x
  2. Step 2: Convert to fraction form
    260.83/390.03 = 257.19/x
  3. Step 3: Cross multiply
    260.83x = 390.03 × 257.19
  4. Step 4: Simplify right side
    260.83x = 100,311.82
  5. Step 5: Solve for x
    x = 100,311.82/260.83
  6. Step 6: Final answer
    x = 384.59

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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.