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Finding the Fourth Proportional to 420.28, 580.02 and 233.83

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Solution

The fourth proportional to 420.28, 580.02 and 233.83 is: 322.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    420.28 : 580.02 = 233.83 : x
  2. Step 2: Convert to fraction form
    420.28/580.02 = 233.83/x
  3. Step 3: Cross multiply
    420.28x = 580.02 × 233.83
  4. Step 4: Simplify right side
    420.28x = 135,626.08
  5. Step 5: Solve for x
    x = 135,626.08/420.28
  6. Step 6: Final answer
    x = 322.70

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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.