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Finding the Fourth Proportional to 618.66, 929.88 and 512.82

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Solution

The fourth proportional to 618.66, 929.88 and 512.82 is: 770.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    618.66 : 929.88 = 512.82 : x
  2. Step 2: Convert to fraction form
    618.66/929.88 = 512.82/x
  3. Step 3: Cross multiply
    618.66x = 929.88 × 512.82
  4. Step 4: Simplify right side
    618.66x = 476,861.06
  5. Step 5: Solve for x
    x = 476,861.06/618.66
  6. Step 6: Final answer
    x = 770.80

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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.