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Finding the Fourth Proportional to 522.57, 720.91 and 345.30

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Solution

The fourth proportional to 522.57, 720.91 and 345.30 is: 476.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    522.57 : 720.91 = 345.30 : x
  2. Step 2: Convert to fraction form
    522.57/720.91 = 345.30/x
  3. Step 3: Cross multiply
    522.57x = 720.91 × 345.30
  4. Step 4: Simplify right side
    522.57x = 248,930.22
  5. Step 5: Solve for x
    x = 248,930.22/522.57
  6. Step 6: Final answer
    x = 476.36

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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.