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Finding the Fourth Proportional to 630.28, 869.76 and 368.44

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Solution

The fourth proportional to 630.28, 869.76 and 368.44 is: 508.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    630.28 : 869.76 = 368.44 : x
  2. Step 2: Convert to fraction form
    630.28/869.76 = 368.44/x
  3. Step 3: Cross multiply
    630.28x = 869.76 × 368.44
  4. Step 4: Simplify right side
    630.28x = 320,454.37
  5. Step 5: Solve for x
    x = 320,454.37/630.28
  6. Step 6: Final answer
    x = 508.43

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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.