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Finding the Fourth Proportional to 630.07, 869.26 and 381.30

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Solution

The fourth proportional to 630.07, 869.26 and 381.30 is: 526.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    630.07 : 869.26 = 381.30 : x
  2. Step 2: Convert to fraction form
    630.07/869.26 = 381.30/x
  3. Step 3: Cross multiply
    630.07x = 869.26 × 381.30
  4. Step 4: Simplify right side
    630.07x = 331,448.55
  5. Step 5: Solve for x
    x = 331,448.55/630.07
  6. Step 6: Final answer
    x = 526.05

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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.