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Finding the Fourth Proportional to 420.01, 579.52 and 320.41

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Solution

The fourth proportional to 420.01, 579.52 and 320.41 is: 442.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    420.01 : 579.52 = 320.41 : x
  2. Step 2: Convert to fraction form
    420.01/579.52 = 320.41/x
  3. Step 3: Cross multiply
    420.01x = 579.52 × 320.41
  4. Step 4: Simplify right side
    420.01x = 185,684.00
  5. Step 5: Solve for x
    x = 185,684.00/420.01
  6. Step 6: Final answer
    x = 442.09

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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.