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Finding the Fourth Proportional to 427.40, 642.54 and 360.44

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Solution

The fourth proportional to 427.40, 642.54 and 360.44 is: 541.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    427.40 : 642.54 = 360.44 : x
  2. Step 2: Convert to fraction form
    427.40/642.54 = 360.44/x
  3. Step 3: Cross multiply
    427.40x = 642.54 × 360.44
  4. Step 4: Simplify right side
    427.40x = 231,597.12
  5. Step 5: Solve for x
    x = 231,597.12/427.40
  6. Step 6: Final answer
    x = 541.87

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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.