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Finding the Fourth Proportional to 716.44, 989.22 and 520.24

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Solution

The fourth proportional to 716.44, 989.22 and 520.24 is: 718.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    716.44 : 989.22 = 520.24 : x
  2. Step 2: Convert to fraction form
    716.44/989.22 = 520.24/x
  3. Step 3: Cross multiply
    716.44x = 989.22 × 520.24
  4. Step 4: Simplify right side
    716.44x = 514,631.81
  5. Step 5: Solve for x
    x = 514,631.81/716.44
  6. Step 6: Final answer
    x = 718.32

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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.