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Finding the Fourth Proportional to 503.70, 753.84 and 321.18

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Solution

The fourth proportional to 503.70, 753.84 and 321.18 is: 480.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    503.70 : 753.84 = 321.18 : x
  2. Step 2: Convert to fraction form
    503.70/753.84 = 321.18/x
  3. Step 3: Cross multiply
    503.70x = 753.84 × 321.18
  4. Step 4: Simplify right side
    503.70x = 242,118.33
  5. Step 5: Solve for x
    x = 242,118.33/503.70
  6. Step 6: Final answer
    x = 480.68

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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.