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Finding the Fourth Proportional to 459.93, 690.11 and 216.41

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Solution

The fourth proportional to 459.93, 690.11 and 216.41 is: 324.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    459.93 : 690.11 = 216.41 : x
  2. Step 2: Convert to fraction form
    459.93/690.11 = 216.41/x
  3. Step 3: Cross multiply
    459.93x = 690.11 × 216.41
  4. Step 4: Simplify right side
    459.93x = 149,346.71
  5. Step 5: Solve for x
    x = 149,346.71/459.93
  6. Step 6: Final answer
    x = 324.72

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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.