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Finding the Fourth Proportional to 465.32, 642.13 and 255.50

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Solution

The fourth proportional to 465.32, 642.13 and 255.50 is: 352.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    465.32 : 642.13 = 255.50 : x
  2. Step 2: Convert to fraction form
    465.32/642.13 = 255.50/x
  3. Step 3: Cross multiply
    465.32x = 642.13 × 255.50
  4. Step 4: Simplify right side
    465.32x = 164,060.84
  5. Step 5: Solve for x
    x = 164,060.84/465.32
  6. Step 6: Final answer
    x = 352.58

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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.