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Finding the Fourth Proportional to 381.03, 525.58 and 282.88

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Solution

The fourth proportional to 381.03, 525.58 and 282.88 is: 390.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    381.03 : 525.58 = 282.88 : x
  2. Step 2: Convert to fraction form
    381.03/525.58 = 282.88/x
  3. Step 3: Cross multiply
    381.03x = 525.58 × 282.88
  4. Step 4: Simplify right side
    381.03x = 148,676.07
  5. Step 5: Solve for x
    x = 148,676.07/381.03
  6. Step 6: Final answer
    x = 390.20

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.