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Finding the Fourth Proportional to 894.31, 1,234.15 and 495.98

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Solution

The fourth proportional to 894.31, 1,234.15 and 495.98 is: 684.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    894.31 : 1,234.15 = 495.98 : x
  2. Step 2: Convert to fraction form
    894.31/1,234.15 = 495.98/x
  3. Step 3: Cross multiply
    894.31x = 1,234.15 × 495.98
  4. Step 4: Simplify right side
    894.31x = 612,112.69
  5. Step 5: Solve for x
    x = 612,112.69/894.31
  6. Step 6: Final answer
    x = 684.45

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.