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Finding the Fourth Proportional to 511.32, 765.59 and 402.87

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Solution

The fourth proportional to 511.32, 765.59 and 402.87 is: 603.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    511.32 : 765.59 = 402.87 : x
  2. Step 2: Convert to fraction form
    511.32/765.59 = 402.87/x
  3. Step 3: Cross multiply
    511.32x = 765.59 × 402.87
  4. Step 4: Simplify right side
    511.32x = 308,431.23
  5. Step 5: Solve for x
    x = 308,431.23/511.32
  6. Step 6: Final answer
    x = 603.21

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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.