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Finding the Fourth Proportional to 557.20, 835.80 and 506.80

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Solution

The fourth proportional to 557.20, 835.80 and 506.80 is: 760.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    557.20 : 835.80 = 506.80 : x
  2. Step 2: Convert to fraction form
    557.20/835.80 = 506.80/x
  3. Step 3: Cross multiply
    557.20x = 835.80 × 506.80
  4. Step 4: Simplify right side
    557.20x = 423,583.44
  5. Step 5: Solve for x
    x = 423,583.44/557.20
  6. Step 6: Final answer
    x = 760.20

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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.