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Finding the Fourth Proportional to 631.45, 944.43 and 515.08

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Solution

The fourth proportional to 631.45, 944.43 and 515.08 is: 770.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    631.45 : 944.43 = 515.08 : x
  2. Step 2: Convert to fraction form
    631.45/944.43 = 515.08/x
  3. Step 3: Cross multiply
    631.45x = 944.43 × 515.08
  4. Step 4: Simplify right side
    631.45x = 486,457.00
  5. Step 5: Solve for x
    x = 486,457.00/631.45
  6. Step 6: Final answer
    x = 770.38

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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.