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Finding the Fourth Proportional to 556.40, 771.36 and 528.32

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Solution

The fourth proportional to 556.40, 771.36 and 528.32 is: 732.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    556.40 : 771.36 = 528.32 : x
  2. Step 2: Convert to fraction form
    556.40/771.36 = 528.32/x
  3. Step 3: Cross multiply
    556.40x = 771.36 × 528.32
  4. Step 4: Simplify right side
    556.40x = 407,524.92
  5. Step 5: Solve for x
    x = 407,524.92/556.40
  6. Step 6: Final answer
    x = 732.43

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.