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Finding the Fourth Proportional to 500.49, 750.99 and 280.98

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Solution

The fourth proportional to 500.49, 750.99 and 280.98 is: 421.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    500.49 : 750.99 = 280.98 : x
  2. Step 2: Convert to fraction form
    500.49/750.99 = 280.98/x
  3. Step 3: Cross multiply
    500.49x = 750.99 × 280.98
  4. Step 4: Simplify right side
    500.49x = 211,013.17
  5. Step 5: Solve for x
    x = 211,013.17/500.49
  6. Step 6: Final answer
    x = 421.61

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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.