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Finding the Fourth Proportional to 520.45, 718.22 and 284.41

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Solution

The fourth proportional to 520.45, 718.22 and 284.41 is: 392.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    520.45 : 718.22 = 284.41 : x
  2. Step 2: Convert to fraction form
    520.45/718.22 = 284.41/x
  3. Step 3: Cross multiply
    520.45x = 718.22 × 284.41
  4. Step 4: Simplify right side
    520.45x = 204,268.95
  5. Step 5: Solve for x
    x = 204,268.95/520.45
  6. Step 6: Final answer
    x = 392.49

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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.