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Finding the Fourth Proportional to 508.26, 763.11 and 485.04

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Solution

The fourth proportional to 508.26, 763.11 and 485.04 is: 728.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    508.26 : 763.11 = 485.04 : x
  2. Step 2: Convert to fraction form
    508.26/763.11 = 485.04/x
  3. Step 3: Cross multiply
    508.26x = 763.11 × 485.04
  4. Step 4: Simplify right side
    508.26x = 370,138.87
  5. Step 5: Solve for x
    x = 370,138.87/508.26
  6. Step 6: Final answer
    x = 728.25

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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.