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Finding the Fourth Proportional to 631.12, 945.46 and 306.72

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Solution

The fourth proportional to 631.12, 945.46 and 306.72 is: 459.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    631.12 : 945.46 = 306.72 : x
  2. Step 2: Convert to fraction form
    631.12/945.46 = 306.72/x
  3. Step 3: Cross multiply
    631.12x = 945.46 × 306.72
  4. Step 4: Simplify right side
    631.12x = 289,991.49
  5. Step 5: Solve for x
    x = 289,991.49/631.12
  6. Step 6: Final answer
    x = 459.49

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1.5x scale

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.