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Finding the Fourth Proportional to 944.79, 1,303.59 and 629.70

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Solution

The fourth proportional to 944.79, 1,303.59 and 629.70 is: 868.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    944.79 : 1,303.59 = 629.70 : x
  2. Step 2: Convert to fraction form
    944.79/1,303.59 = 629.70/x
  3. Step 3: Cross multiply
    944.79x = 1,303.59 × 629.70
  4. Step 4: Simplify right side
    944.79x = 820,870.62
  5. Step 5: Solve for x
    x = 820,870.62/944.79
  6. Step 6: Final answer
    x = 868.84

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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.