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Finding the Fourth Proportional to 631.19, 945.31 and 609.29

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Solution

The fourth proportional to 631.19, 945.31 and 609.29 is: 912.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    631.19 : 945.31 = 609.29 : x
  2. Step 2: Convert to fraction form
    631.19/945.31 = 609.29/x
  3. Step 3: Cross multiply
    631.19x = 945.31 × 609.29
  4. Step 4: Simplify right side
    631.19x = 575,971.05
  5. Step 5: Solve for x
    x = 575,971.05/631.19
  6. Step 6: Final answer
    x = 912.52

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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.