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Finding the Fourth Proportional to 535.51, 803.72 and 381.81

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Solution

The fourth proportional to 535.51, 803.72 and 381.81 is: 573.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    535.51 : 803.72 = 381.81 : x
  2. Step 2: Convert to fraction form
    535.51/803.72 = 381.81/x
  3. Step 3: Cross multiply
    535.51x = 803.72 × 381.81
  4. Step 4: Simplify right side
    535.51x = 306,872.30
  5. Step 5: Solve for x
    x = 306,872.30/535.51
  6. Step 6: Final answer
    x = 573.05

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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.