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Finding the Fourth Proportional to 959.34, 1,439.60 and 629.51

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Solution

The fourth proportional to 959.34, 1,439.60 and 629.51 is: 944.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    959.34 : 1,439.60 = 629.51 : x
  2. Step 2: Convert to fraction form
    959.34/1,439.60 = 629.51/x
  3. Step 3: Cross multiply
    959.34x = 1,439.60 × 629.51
  4. Step 4: Simplify right side
    959.34x = 906,232.25
  5. Step 5: Solve for x
    x = 906,232.25/959.34
  6. Step 6: Final answer
    x = 944.64

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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.