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Finding the Fourth Proportional to 773, 1,159.62 and 260.12

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Solution

The fourth proportional to 773, 1,159.62 and 260.12 is: 390.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    773 : 1,159.62 = 260.12 : x
  2. Step 2: Convert to fraction form
    773/1,159.62 = 260.12/x
  3. Step 3: Cross multiply
    773x = 1,159.62 × 260.12
  4. Step 4: Simplify right side
    773x = 301,640.35
  5. Step 5: Solve for x
    x = 301,640.35/773
  6. Step 6: Final answer
    x = 390.22

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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.