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Finding the Fourth Proportional to 613.46, 918.54 and 324.28

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Solution

The fourth proportional to 613.46, 918.54 and 324.28 is: 485.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    613.46 : 918.54 = 324.28 : x
  2. Step 2: Convert to fraction form
    613.46/918.54 = 324.28/x
  3. Step 3: Cross multiply
    613.46x = 918.54 × 324.28
  4. Step 4: Simplify right side
    613.46x = 297,864.15
  5. Step 5: Solve for x
    x = 297,864.15/613.46
  6. Step 6: Final answer
    x = 485.55

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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.