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Finding the Fourth Proportional to 465.20, 642.30 and 360.12

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Solution

The fourth proportional to 465.20, 642.30 and 360.12 is: 497.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    465.20 : 642.30 = 360.12 : x
  2. Step 2: Convert to fraction form
    465.20/642.30 = 360.12/x
  3. Step 3: Cross multiply
    465.20x = 642.30 × 360.12
  4. Step 4: Simplify right side
    465.20x = 231,305.08
  5. Step 5: Solve for x
    x = 231,305.08/465.20
  6. Step 6: Final answer
    x = 497.22

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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.