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Finding the Fourth Proportional to 528.53, 790.97 and 445.91

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Solution

The fourth proportional to 528.53, 790.97 and 445.91 is: 667.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    528.53 : 790.97 = 445.91 : x
  2. Step 2: Convert to fraction form
    528.53/790.97 = 445.91/x
  3. Step 3: Cross multiply
    528.53x = 790.97 × 445.91
  4. Step 4: Simplify right side
    528.53x = 352,695.25
  5. Step 5: Solve for x
    x = 352,695.25/528.53
  6. Step 6: Final answer
    x = 667.32

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.