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Finding the Fourth Proportional to 607.76, 911.30 and 260.88

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Solution

The fourth proportional to 607.76, 911.30 and 260.88 is: 391.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    607.76 : 911.30 = 260.88 : x
  2. Step 2: Convert to fraction form
    607.76/911.30 = 260.88/x
  3. Step 3: Cross multiply
    607.76x = 911.30 × 260.88
  4. Step 4: Simplify right side
    607.76x = 237,735.22
  5. Step 5: Solve for x
    x = 237,735.22/607.76
  6. Step 6: Final answer
    x = 391.17

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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.