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Finding the Fourth Proportional to 522.30, 720.75 and 289.44

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Solution

The fourth proportional to 522.30, 720.75 and 289.44 is: 399.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    522.30 : 720.75 = 289.44 : x
  2. Step 2: Convert to fraction form
    522.30/720.75 = 289.44/x
  3. Step 3: Cross multiply
    522.30x = 720.75 × 289.44
  4. Step 4: Simplify right side
    522.30x = 208,613.88
  5. Step 5: Solve for x
    x = 208,613.88/522.30
  6. Step 6: Final answer
    x = 399.41

Related Problems

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Similar ratio
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1.5x scale

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.