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Finding the Fourth Proportional to 630.03, 869.08 and 381.27

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Solution

The fourth proportional to 630.03, 869.08 and 381.27 is: 525.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    630.03 : 869.08 = 381.27 : x
  2. Step 2: Convert to fraction form
    630.03/869.08 = 381.27/x
  3. Step 3: Cross multiply
    630.03x = 869.08 × 381.27
  4. Step 4: Simplify right side
    630.03x = 331,354.13
  5. Step 5: Solve for x
    x = 331,354.13/630.03
  6. Step 6: Final answer
    x = 525.93

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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.