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Finding the Fourth Proportional to 950.58, 1,426.28 and 643.59

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Solution

The fourth proportional to 950.58, 1,426.28 and 643.59 is: 965.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    950.58 : 1,426.28 = 643.59 : x
  2. Step 2: Convert to fraction form
    950.58/1,426.28 = 643.59/x
  3. Step 3: Cross multiply
    950.58x = 1,426.28 × 643.59
  4. Step 4: Simplify right side
    950.58x = 917,936.33
  5. Step 5: Solve for x
    x = 917,936.33/950.58
  6. Step 6: Final answer
    x = 965.66

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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.