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Finding the Fourth Proportional to 605.90, 836.61 and 465.80

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Solution

The fourth proportional to 605.90, 836.61 and 465.80 is: 643.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    605.90 : 836.61 = 465.80 : x
  2. Step 2: Convert to fraction form
    605.90/836.61 = 465.80/x
  3. Step 3: Cross multiply
    605.90x = 836.61 × 465.80
  4. Step 4: Simplify right side
    605.90x = 389,688.75
  5. Step 5: Solve for x
    x = 389,688.75/605.90
  6. Step 6: Final answer
    x = 643.16

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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.