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Finding the Fourth Proportional to 459.81, 685.66 and 426.33

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Solution

The fourth proportional to 459.81, 685.66 and 426.33 is: 635.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    459.81 : 685.66 = 426.33 : x
  2. Step 2: Convert to fraction form
    459.81/685.66 = 426.33/x
  3. Step 3: Cross multiply
    459.81x = 685.66 × 426.33
  4. Step 4: Simplify right side
    459.81x = 292,319.14
  5. Step 5: Solve for x
    x = 292,319.14/459.81
  6. Step 6: Final answer
    x = 635.74

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.