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Finding the Fourth Proportional to 465.32, 642.14 and 255.49

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Solution

The fourth proportional to 465.32, 642.14 and 255.49 is: 352.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    465.32 : 642.14 = 255.49 : x
  2. Step 2: Convert to fraction form
    465.32/642.14 = 255.49/x
  3. Step 3: Cross multiply
    465.32x = 642.14 × 255.49
  4. Step 4: Simplify right side
    465.32x = 164,055.86
  5. Step 5: Solve for x
    x = 164,055.86/465.32
  6. Step 6: Final answer
    x = 352.57

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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.