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Finding the Fourth Proportional to 550.80, 824.52 and 515.28

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Solution

The fourth proportional to 550.80, 824.52 and 515.28 is: 771.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    550.80 : 824.52 = 515.28 : x
  2. Step 2: Convert to fraction form
    550.80/824.52 = 515.28/x
  3. Step 3: Cross multiply
    550.80x = 824.52 × 515.28
  4. Step 4: Simplify right side
    550.80x = 424,858.67
  5. Step 5: Solve for x
    x = 424,858.67/550.80
  6. Step 6: Final answer
    x = 771.35

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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.