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Finding the Fourth Proportional to 522.06, 720.18 and 356.28

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Solution

The fourth proportional to 522.06, 720.18 and 356.28 is: 491.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    522.06 : 720.18 = 356.28 : x
  2. Step 2: Convert to fraction form
    522.06/720.18 = 356.28/x
  3. Step 3: Cross multiply
    522.06x = 720.18 × 356.28
  4. Step 4: Simplify right side
    522.06x = 256,585.73
  5. Step 5: Solve for x
    x = 256,585.73/522.06
  6. Step 6: Final answer
    x = 491.49

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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.