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Finding the Fourth Proportional to 638.13, 955.83 and 535.62

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Solution

The fourth proportional to 638.13, 955.83 and 535.62 is: 802.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    638.13 : 955.83 = 535.62 : x
  2. Step 2: Convert to fraction form
    638.13/955.83 = 535.62/x
  3. Step 3: Cross multiply
    638.13x = 955.83 × 535.62
  4. Step 4: Simplify right side
    638.13x = 511,961.66
  5. Step 5: Solve for x
    x = 511,961.66/638.13
  6. Step 6: Final answer
    x = 802.28

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.