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Finding the Fourth Proportional to 503.12, 753.87 and 381.22

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Solution

The fourth proportional to 503.12, 753.87 and 381.22 is: 571.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    503.12 : 753.87 = 381.22 : x
  2. Step 2: Convert to fraction form
    503.12/753.87 = 381.22/x
  3. Step 3: Cross multiply
    503.12x = 753.87 × 381.22
  4. Step 4: Simplify right side
    503.12x = 287,390.32
  5. Step 5: Solve for x
    x = 287,390.32/503.12
  6. Step 6: Final answer
    x = 571.22

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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.