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Finding the Fourth Proportional to 631.68, 946.12 and 306.36

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Solution

The fourth proportional to 631.68, 946.12 and 306.36 is: 458.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    631.68 : 946.12 = 306.36 : x
  2. Step 2: Convert to fraction form
    631.68/946.12 = 306.36/x
  3. Step 3: Cross multiply
    631.68x = 946.12 × 306.36
  4. Step 4: Simplify right side
    631.68x = 289,853.32
  5. Step 5: Solve for x
    x = 289,853.32/631.68
  6. Step 6: Final answer
    x = 458.86

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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.