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Finding the Fourth Proportional to 631.99, 946.62 and 412.38

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Solution

The fourth proportional to 631.99, 946.62 and 412.38 is: 617.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    631.99 : 946.62 = 412.38 : x
  2. Step 2: Convert to fraction form
    631.99/946.62 = 412.38/x
  3. Step 3: Cross multiply
    631.99x = 946.62 × 412.38
  4. Step 4: Simplify right side
    631.99x = 390,367.16
  5. Step 5: Solve for x
    x = 390,367.16/631.99
  6. Step 6: Final answer
    x = 617.68

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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.