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Finding the Fourth Proportional to 631.60, 946.44 and 306.88

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Solution

The fourth proportional to 631.60, 946.44 and 306.88 is: 459.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    631.60 : 946.44 = 306.88 : x
  2. Step 2: Convert to fraction form
    631.60/946.44 = 306.88/x
  3. Step 3: Cross multiply
    631.60x = 946.44 × 306.88
  4. Step 4: Simplify right side
    631.60x = 290,443.51
  5. Step 5: Solve for x
    x = 290,443.51/631.60
  6. Step 6: Final answer
    x = 459.85

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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.