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Finding the Fourth Proportional to 360.79, 498 and 261.28

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Solution

The fourth proportional to 360.79, 498 and 261.28 is: 360.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    360.79 : 498 = 261.28 : x
  2. Step 2: Convert to fraction form
    360.79/498 = 261.28/x
  3. Step 3: Cross multiply
    360.79x = 498 × 261.28
  4. Step 4: Simplify right side
    360.79x = 130,117.44
  5. Step 5: Solve for x
    x = 130,117.44/360.79
  6. Step 6: Final answer
    x = 360.65

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.