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Finding the Fourth Proportional to 508.95, 763.98 and 406.89

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Solution

The fourth proportional to 508.95, 763.98 and 406.89 is: 610.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    508.95 : 763.98 = 406.89 : x
  2. Step 2: Convert to fraction form
    508.95/763.98 = 406.89/x
  3. Step 3: Cross multiply
    508.95x = 763.98 × 406.89
  4. Step 4: Simplify right side
    508.95x = 310,855.82
  5. Step 5: Solve for x
    x = 310,855.82/508.95
  6. Step 6: Final answer
    x = 610.78

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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.