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Finding the Fourth Proportional to 511.08, 767.44 and 485.08

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Solution

The fourth proportional to 511.08, 767.44 and 485.08 is: 728.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    511.08 : 767.44 = 485.08 : x
  2. Step 2: Convert to fraction form
    511.08/767.44 = 485.08/x
  3. Step 3: Cross multiply
    511.08x = 767.44 × 485.08
  4. Step 4: Simplify right side
    511.08x = 372,269.80
  5. Step 5: Solve for x
    x = 372,269.80/511.08
  6. Step 6: Final answer
    x = 728.40

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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.