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Finding the Fourth Proportional to 497.75, 746.63 and 280.88

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Solution

The fourth proportional to 497.75, 746.63 and 280.88 is: 421.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    497.75 : 746.63 = 280.88 : x
  2. Step 2: Convert to fraction form
    497.75/746.63 = 280.88/x
  3. Step 3: Cross multiply
    497.75x = 746.63 × 280.88
  4. Step 4: Simplify right side
    497.75x = 209,710.40
  5. Step 5: Solve for x
    x = 209,710.40/497.75
  6. Step 6: Final answer
    x = 421.31

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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.