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Finding the Fourth Proportional to 573.28, 855.50 and 511.75

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Solution

The fourth proportional to 573.28, 855.50 and 511.75 is: 763.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    573.28 : 855.50 = 511.75 : x
  2. Step 2: Convert to fraction form
    573.28/855.50 = 511.75/x
  3. Step 3: Cross multiply
    573.28x = 855.50 × 511.75
  4. Step 4: Simplify right side
    573.28x = 437,800.64
  5. Step 5: Solve for x
    x = 437,800.64/573.28
  6. Step 6: Final answer
    x = 763.68

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.