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Finding the Fourth Proportional to 630.11, 945.31 and 191.35

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Solution

The fourth proportional to 630.11, 945.31 and 191.35 is: 287.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    630.11 : 945.31 = 191.35 : x
  2. Step 2: Convert to fraction form
    630.11/945.31 = 191.35/x
  3. Step 3: Cross multiply
    630.11x = 945.31 × 191.35
  4. Step 4: Simplify right side
    630.11x = 180,885.07
  5. Step 5: Solve for x
    x = 180,885.07/630.11
  6. Step 6: Final answer
    x = 287.07

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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.