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Finding the Fourth Proportional to 528.07, 728.44 and 475.22

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Solution

The fourth proportional to 528.07, 728.44 and 475.22 is: 655.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    528.07 : 728.44 = 475.22 : x
  2. Step 2: Convert to fraction form
    528.07/728.44 = 475.22/x
  3. Step 3: Cross multiply
    528.07x = 728.44 × 475.22
  4. Step 4: Simplify right side
    528.07x = 346,169.26
  5. Step 5: Solve for x
    x = 346,169.26/528.07
  6. Step 6: Final answer
    x = 655.54

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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.