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Finding the Fourth Proportional to 508.94, 765.12 and 418.34

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Solution

The fourth proportional to 508.94, 765.12 and 418.34 is: 628.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    508.94 : 765.12 = 418.34 : x
  2. Step 2: Convert to fraction form
    508.94/765.12 = 418.34/x
  3. Step 3: Cross multiply
    508.94x = 765.12 × 418.34
  4. Step 4: Simplify right side
    508.94x = 320,080.30
  5. Step 5: Solve for x
    x = 320,080.30/508.94
  6. Step 6: Final answer
    x = 628.92

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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.