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Finding the Fourth Proportional to 459.66, 634.56 and 319.53

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Solution

The fourth proportional to 459.66, 634.56 and 319.53 is: 441.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    459.66 : 634.56 = 319.53 : x
  2. Step 2: Convert to fraction form
    459.66/634.56 = 319.53/x
  3. Step 3: Cross multiply
    459.66x = 634.56 × 319.53
  4. Step 4: Simplify right side
    459.66x = 202,760.96
  5. Step 5: Solve for x
    x = 202,760.96/459.66
  6. Step 6: Final answer
    x = 441.11

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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.