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Finding the Fourth Proportional to 503.68, 755.31 and 210.99

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Solution

The fourth proportional to 503.68, 755.31 and 210.99 is: 316.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    503.68 : 755.31 = 210.99 : x
  2. Step 2: Convert to fraction form
    503.68/755.31 = 210.99/x
  3. Step 3: Cross multiply
    503.68x = 755.31 × 210.99
  4. Step 4: Simplify right side
    503.68x = 159,362.86
  5. Step 5: Solve for x
    x = 159,362.86/503.68
  6. Step 6: Final answer
    x = 316.40

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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.