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Finding the Fourth Proportional to 612.83, 843.59 and 465.41

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Solution

The fourth proportional to 612.83, 843.59 and 465.41 is: 640.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    612.83 : 843.59 = 465.41 : x
  2. Step 2: Convert to fraction form
    612.83/843.59 = 465.41/x
  3. Step 3: Cross multiply
    612.83x = 843.59 × 465.41
  4. Step 4: Simplify right side
    612.83x = 392,608.68
  5. Step 5: Solve for x
    x = 392,608.68/612.83
  6. Step 6: Final answer
    x = 640.65

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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.