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Finding the Fourth Proportional to 958.51, 1,322.99 and 664.17

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Solution

The fourth proportional to 958.51, 1,322.99 and 664.17 is: 916.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    958.51 : 1,322.99 = 664.17 : x
  2. Step 2: Convert to fraction form
    958.51/1,322.99 = 664.17/x
  3. Step 3: Cross multiply
    958.51x = 1,322.99 × 664.17
  4. Step 4: Simplify right side
    958.51x = 878,690.27
  5. Step 5: Solve for x
    x = 878,690.27/958.51
  6. Step 6: Final answer
    x = 916.73

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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.