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Finding the Fourth Proportional to 953.71, 1,317.41 and 719.44

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Solution

The fourth proportional to 953.71, 1,317.41 and 719.44 is: 993.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    953.71 : 1,317.41 = 719.44 : x
  2. Step 2: Convert to fraction form
    953.71/1,317.41 = 719.44/x
  3. Step 3: Cross multiply
    953.71x = 1,317.41 × 719.44
  4. Step 4: Simplify right side
    953.71x = 947,797.45
  5. Step 5: Solve for x
    x = 947,797.45/953.71
  6. Step 6: Final answer
    x = 993.80

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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.