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Finding the Fourth Proportional to 505.10, 696.85 and 330.68

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Solution

The fourth proportional to 505.10, 696.85 and 330.68 is: 456.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    505.10 : 696.85 = 330.68 : x
  2. Step 2: Convert to fraction form
    505.10/696.85 = 330.68/x
  3. Step 3: Cross multiply
    505.10x = 696.85 × 330.68
  4. Step 4: Simplify right side
    505.10x = 230,430.05
  5. Step 5: Solve for x
    x = 230,430.05/505.10
  6. Step 6: Final answer
    x = 456.21

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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.