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Finding the Fourth Proportional to 503.04, 754.80 and 320.80

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Solution

The fourth proportional to 503.04, 754.80 and 320.80 is: 481.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    503.04 : 754.80 = 320.80 : x
  2. Step 2: Convert to fraction form
    503.04/754.80 = 320.80/x
  3. Step 3: Cross multiply
    503.04x = 754.80 × 320.80
  4. Step 4: Simplify right side
    503.04x = 242,139.84
  5. Step 5: Solve for x
    x = 242,139.84/503.04
  6. Step 6: Final answer
    x = 481.35

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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.