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Finding the Fourth Proportional to 511.64, 766.08 and 389.32

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Solution

The fourth proportional to 511.64, 766.08 and 389.32 is: 582.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    511.64 : 766.08 = 389.32 : x
  2. Step 2: Convert to fraction form
    511.64/766.08 = 389.32/x
  3. Step 3: Cross multiply
    511.64x = 766.08 × 389.32
  4. Step 4: Simplify right side
    511.64x = 298,250.27
  5. Step 5: Solve for x
    x = 298,250.27/511.64
  6. Step 6: Final answer
    x = 582.93

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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.