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Finding the Fourth Proportional to 556.36, 833.82 and 420.28

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Solution

The fourth proportional to 556.36, 833.82 and 420.28 is: 629.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    556.36 : 833.82 = 420.28 : x
  2. Step 2: Convert to fraction form
    556.36/833.82 = 420.28/x
  3. Step 3: Cross multiply
    556.36x = 833.82 × 420.28
  4. Step 4: Simplify right side
    556.36x = 350,437.87
  5. Step 5: Solve for x
    x = 350,437.87/556.36
  6. Step 6: Final answer
    x = 629.88

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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.