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Finding the Fourth Proportional to 773.58, 1,160.37 and 260.58

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Solution

The fourth proportional to 773.58, 1,160.37 and 260.58 is: 390.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    773.58 : 1,160.37 = 260.58 : x
  2. Step 2: Convert to fraction form
    773.58/1,160.37 = 260.58/x
  3. Step 3: Cross multiply
    773.58x = 1,160.37 × 260.58
  4. Step 4: Simplify right side
    773.58x = 302,369.21
  5. Step 5: Solve for x
    x = 302,369.21/773.58
  6. Step 6: Final answer
    x = 390.87

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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.