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Finding the Fourth Proportional to 511.11, 766.70 and 372.72

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Solution

The fourth proportional to 511.11, 766.70 and 372.72 is: 559.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    511.11 : 766.70 = 372.72 : x
  2. Step 2: Convert to fraction form
    511.11/766.70 = 372.72/x
  3. Step 3: Cross multiply
    511.11x = 766.70 × 372.72
  4. Step 4: Simplify right side
    511.11x = 285,762.56
  5. Step 5: Solve for x
    x = 285,762.56/511.11
  6. Step 6: Final answer
    x = 559.10

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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.