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Finding the Fourth Proportional to 503.89, 755.82 and 287

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Solution

The fourth proportional to 503.89, 755.82 and 287 is: 430.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    503.89 : 755.82 = 287 : x
  2. Step 2: Convert to fraction form
    503.89/755.82 = 287/x
  3. Step 3: Cross multiply
    503.89x = 755.82 × 287
  4. Step 4: Simplify right side
    503.89x = 216,920.34
  5. Step 5: Solve for x
    x = 216,920.34/503.89
  6. Step 6: Final answer
    x = 430.49

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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.