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Finding the Fourth Proportional to 465.35, 642.45 and 347.18

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Solution

The fourth proportional to 465.35, 642.45 and 347.18 is: 479.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    465.35 : 642.45 = 347.18 : x
  2. Step 2: Convert to fraction form
    465.35/642.45 = 347.18/x
  3. Step 3: Cross multiply
    465.35x = 642.45 × 347.18
  4. Step 4: Simplify right side
    465.35x = 223,042.58
  5. Step 5: Solve for x
    x = 223,042.58/465.35
  6. Step 6: Final answer
    x = 479.31

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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.