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Finding the Fourth Proportional to 631.78, 948.06 and 446.56

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Solution

The fourth proportional to 631.78, 948.06 and 446.56 is: 670.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    631.78 : 948.06 = 446.56 : x
  2. Step 2: Convert to fraction form
    631.78/948.06 = 446.56/x
  3. Step 3: Cross multiply
    631.78x = 948.06 × 446.56
  4. Step 4: Simplify right side
    631.78x = 423,363.30
  5. Step 5: Solve for x
    x = 423,363.30/631.78
  6. Step 6: Final answer
    x = 670.11

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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.