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Finding the Fourth Proportional to 459.97, 690.05 and 171.39

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Solution

The fourth proportional to 459.97, 690.05 and 171.39 is: 257.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    459.97 : 690.05 = 171.39 : x
  2. Step 2: Convert to fraction form
    459.97/690.05 = 171.39/x
  3. Step 3: Cross multiply
    459.97x = 690.05 × 171.39
  4. Step 4: Simplify right side
    459.97x = 118,266.81
  5. Step 5: Solve for x
    x = 118,266.81/459.97
  6. Step 6: Final answer
    x = 257.12

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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.