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Finding the Fourth Proportional to 420.17, 579.87 and 233.73

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Solution

The fourth proportional to 420.17, 579.87 and 233.73 is: 322.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    420.17 : 579.87 = 233.73 : x
  2. Step 2: Convert to fraction form
    420.17/579.87 = 233.73/x
  3. Step 3: Cross multiply
    420.17x = 579.87 × 233.73
  4. Step 4: Simplify right side
    420.17x = 135,533.02
  5. Step 5: Solve for x
    x = 135,533.02/420.17
  6. Step 6: Final answer
    x = 322.57

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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.