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Finding the Fourth Proportional to 504.30, 756.45 and 321.15

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Solution

The fourth proportional to 504.30, 756.45 and 321.15 is: 481.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    504.30 : 756.45 = 321.15 : x
  2. Step 2: Convert to fraction form
    504.30/756.45 = 321.15/x
  3. Step 3: Cross multiply
    504.30x = 756.45 × 321.15
  4. Step 4: Simplify right side
    504.30x = 242,933.92
  5. Step 5: Solve for x
    x = 242,933.92/504.30
  6. Step 6: Final answer
    x = 481.73

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Double scale
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Similar ratio
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1.5x scale

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.