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Finding the Fourth Proportional to 511.31, 766.51 and 425.35

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Solution

The fourth proportional to 511.31, 766.51 and 425.35 is: 637.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    511.31 : 766.51 = 425.35 : x
  2. Step 2: Convert to fraction form
    511.31/766.51 = 425.35/x
  3. Step 3: Cross multiply
    511.31x = 766.51 × 425.35
  4. Step 4: Simplify right side
    511.31x = 326,029.07
  5. Step 5: Solve for x
    x = 326,029.07/511.31
  6. Step 6: Final answer
    x = 637.64

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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.