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Finding the Fourth Proportional to 621.24, 855.04 and 496.50

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Solution

The fourth proportional to 621.24, 855.04 and 496.50 is: 683.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    621.24 : 855.04 = 496.50 : x
  2. Step 2: Convert to fraction form
    621.24/855.04 = 496.50/x
  3. Step 3: Cross multiply
    621.24x = 855.04 × 496.50
  4. Step 4: Simplify right side
    621.24x = 424,527.36
  5. Step 5: Solve for x
    x = 424,527.36/621.24
  6. Step 6: Final answer
    x = 683.35

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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.