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Finding the Fourth Proportional to 556.32, 768 and 441.20

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Solution

The fourth proportional to 556.32, 768 and 441.20 is: 609.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    556.32 : 768 = 441.20 : x
  2. Step 2: Convert to fraction form
    556.32/768 = 441.20/x
  3. Step 3: Cross multiply
    556.32x = 768 × 441.20
  4. Step 4: Simplify right side
    556.32x = 338,841.60
  5. Step 5: Solve for x
    x = 338,841.60/556.32
  6. Step 6: Final answer
    x = 609.08

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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.