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Finding the Fourth Proportional to 944.45, 1,303.80 and 629.90

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Solution

The fourth proportional to 944.45, 1,303.80 and 629.90 is: 869.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    944.45 : 1,303.80 = 629.90 : x
  2. Step 2: Convert to fraction form
    944.45/1,303.80 = 629.90/x
  3. Step 3: Cross multiply
    944.45x = 1,303.80 × 629.90
  4. Step 4: Simplify right side
    944.45x = 821,263.62
  5. Step 5: Solve for x
    x = 821,263.62/944.45
  6. Step 6: Final answer
    x = 869.57

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.