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Finding the Fourth Proportional to 420.06, 579.26 and 361.26

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Solution

The fourth proportional to 420.06, 579.26 and 361.26 is: 498.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    420.06 : 579.26 = 361.26 : x
  2. Step 2: Convert to fraction form
    420.06/579.26 = 361.26/x
  3. Step 3: Cross multiply
    420.06x = 579.26 × 361.26
  4. Step 4: Simplify right side
    420.06x = 209,263.47
  5. Step 5: Solve for x
    x = 209,263.47/420.06
  6. Step 6: Final answer
    x = 498.18

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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.